diff --git "a/metadata.jsonl" "b/metadata.jsonl"
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+++ "b/metadata.jsonl"
@@ -0,0 +1,116 @@
+{"type": "synthetic", "task_id": "syn_001_reappear_01", "scene": "Bird Platform", "video": "videos/synthetic/syn_001.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a wooden intertidal bird-banding platform facing a tidal creek and salt marsh. A wooden safety rail, field bins, and a compact work area sit in the foreground. The view stays still except for mild handheld sway. Creek water ripples, salt grass sways, and clouds drift slowly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns left from the platform view until a striped tide gauge stands centered beyond the wooden safety rail, with the tidal creek and salt marsh behind it. After holding that view, the viewpoint turns back to the opening platform view."}, {"clip_id": "03", "clip_prompt": "Hands bring a pair of compact twin-barrel binoculars into clear view at chest height, grasp both barrels, turn the central focusing wheel once, then lower the binoculars out of view. The view stays on the tidal creek and salt grass."}, {"clip_id": "04", "clip_prompt": "A field researcher's hands bring a handheld oval mesh capture net into clear view in front of the wooden safety rail, hold it briefly, then lower the capture net out of view. The view stays on the tidal creek and salt marsh."}, {"clip_id": "05", "clip_prompt": "A first-person view from a wooden intertidal bird-banding platform facing a tidal creek and salt marsh. A wooden safety rail, field bins, and a compact work area sit in the foreground. The view stays still except for mild handheld sway. Creek ripples, salt grass, and drifting clouds continue."}, {"clip_id": "06", "clip_prompt": "A first-person view from a wooden intertidal bird-banding platform facing a tidal creek and salt marsh. Field bins sit behind a wooden safety rail. The view stays still except for mild handheld sway. Creek water, salt grass, and clouds keep moving slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical pair of compact twin-barrel binoculars from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the binoculars. The action is explicit and continuous: the same hands naturally bring the same binoculars back into clear view at chest height, grasp both barrels in the same manner, turn the same central focusing wheel once, and continue the observed handling motion. Preserve the binoculars' exact instance identity, twin-barrel and hinge geometry, dimensions, proportions, eyepieces, objective housings, focusing wheel, strap, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "compact maritime binoculars with deep navy pebble-grain rubber armor, two broad mustard-yellow objective rings, an oversized brass focusing wheel, and a cream cross-stitched canvas strap", "target_aliases": ["binoculars"], "references": [{"timestamp_seconds": 24.985, "frame_index": 600, "bbox_xyxy_normalized": [0.21995192307692307, 0.03958333333333333, 0.6514423076923077, 0.9541666666666667]}]}
+{"type": "synthetic", "task_id": "syn_001_reappear_02", "scene": "Bird Platform", "video": "videos/synthetic/syn_001.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a wooden intertidal bird-banding platform facing a tidal creek and salt marsh. A wooden safety rail, field bins, and a compact work area sit in the foreground. The view stays still except for mild handheld sway. Creek water ripples, salt grass sways, and clouds drift slowly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns left from the platform view until a striped tide gauge stands centered beyond the wooden safety rail, with the tidal creek and salt marsh behind it. After holding that view, the viewpoint turns back to the opening platform view."}, {"clip_id": "03", "clip_prompt": "Hands bring a pair of compact twin-barrel binoculars into clear view at chest height, grasp both barrels, turn the central focusing wheel once, then lower the binoculars out of view. The view stays on the tidal creek and salt grass."}, {"clip_id": "04", "clip_prompt": "A field researcher's hands bring a handheld oval mesh capture net into clear view in front of the wooden safety rail, hold it briefly, then lower the capture net out of view. The view stays on the tidal creek and salt marsh."}, {"clip_id": "05", "clip_prompt": "A first-person view from a wooden intertidal bird-banding platform facing a tidal creek and salt marsh. A wooden safety rail, field bins, and a compact work area sit in the foreground. The view stays still except for mild handheld sway. Creek ripples, salt grass, and drifting clouds continue."}, {"clip_id": "06", "clip_prompt": "A first-person view from a wooden intertidal bird-banding platform facing a tidal creek and salt marsh. Field bins sit behind a wooden safety rail. The view stays still except for mild handheld sway. Creek water, salt grass, and clouds keep moving slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical handheld oval mesh capture net from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the capture net. The action is explicit and continuous: the same field researcher's hands naturally bring the same handheld oval mesh capture net back into clear view. Preserve the capture net's exact instance identity, oval hoop and mesh geometry, dimensions, proportions, throat, handle, reinforced parts, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "an oval field capture net with a pale ash-wood hoop, broad teal-and-cream diamond mesh, a rust-orange reinforced throat, and a dark cork-wrapped handle", "target_aliases": ["capture net"], "references": [{"timestamp_seconds": 31.808, "frame_index": 763, "bbox_xyxy_normalized": [0.30528846153846156, 0.10416666666666667, 0.9242788461538461, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_001_revisit_01", "scene": "Bird Platform", "video": "videos/synthetic/syn_001.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a wooden intertidal bird-banding platform facing a tidal creek and salt marsh. A wooden safety rail, field bins, and a compact work area sit in the foreground. The view stays still except for mild handheld sway. Creek water ripples, salt grass sways, and clouds drift slowly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns left from the platform view until a striped tide gauge stands centered beyond the wooden safety rail, with the tidal creek and salt marsh behind it. After holding that view, the viewpoint turns back to the opening platform view."}, {"clip_id": "03", "clip_prompt": "Hands bring a pair of compact twin-barrel binoculars into clear view at chest height, grasp both barrels, turn the central focusing wheel once, then lower the binoculars out of view. The view stays on the tidal creek and salt grass."}, {"clip_id": "04", "clip_prompt": "A field researcher's hands bring a handheld oval mesh capture net into clear view in front of the wooden safety rail, hold it briefly, then lower the capture net out of view. The view stays on the tidal creek and salt marsh."}, {"clip_id": "05", "clip_prompt": "A first-person view from a wooden intertidal bird-banding platform facing a tidal creek and salt marsh. A wooden safety rail, field bins, and a compact work area sit in the foreground. The view stays still except for mild handheld sway. Creek ripples, salt grass, and drifting clouds continue."}, {"clip_id": "06", "clip_prompt": "A first-person view from a wooden intertidal bird-banding platform facing a tidal creek and salt marsh. Field bins sit behind a wooden safety rail. The view stays still except for mild handheld sway. Creek water, salt grass, and clouds keep moving slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed striped tide gauge fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the tide gauge's identity and placement, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a segmented galvanized tide gauge with broad alternating black-and-ivory enamel measuring blocks, a weathered copper-red round cap, and natural barnacle buildup around its lower section", "target_aliases": ["tide gauge"], "references": [{"timestamp_seconds": 14.41, "frame_index": 346, "bbox_xyxy_normalized": [0.3798076923076923, 0.03125, 0.5600961538461539, 0.8125]}]}
+{"type": "synthetic", "task_id": "syn_002_reappear_01", "scene": "Volcano Observatory", "video": "videos/synthetic/syn_002.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a volcano monitoring terrace facing a dark lava slope. A steel guardrail, warning ribbon, sensor cables, and a low instrument cabinet occupy the terrace. A thin steam plume rises near the cabinet. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A gloved hand brings a handheld gas detector with its curved sampling probe into clear view, holds it in the foreground, then lowers the gas detector out of view. The view stays on the terrace and lava slope."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the terrace view until a concrete seismic sensor pillar with stacked isolation collars fills the near view beside the terrace guardrail. After holding that view, the viewpoint turns back to the opening terrace view."}, {"clip_id": "04", "clip_prompt": "A technician rolls a wheeled field spectrometer cart into clear view and into a measuring position on the terrace, then rolls the cart out of view. The view stays on the terrace and lava slope."}, {"clip_id": "05", "clip_prompt": "A first-person view from a volcano monitoring terrace facing a dark lava slope. A steel guardrail, warning ribbon, and an instrument cabinet stay in place. Steam keeps rising near the cabinet. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view from a volcano monitoring terrace facing a dark lava slope. Steam rises near an instrument cabinet, and cloud shadows drift across the slope. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical handheld gas detector with its curved sampling probe from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the gas detector. The action is explicit and continuous: the same gloved hand naturally brings the same handheld gas detector with its curved sampling probe back into clear view. Preserve the gas detector's exact instance identity, housing and curved sampling-probe geometry, dimensions, proportions, display, corner bumpers, controls, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a field gas detector with a graphite vertically ribbed housing, a wide amber glass readout window, pale teal corner bumpers, and a curved stainless-steel sampling tube", "target_aliases": ["gas detector"], "references": [{"timestamp_seconds": 12.391, "frame_index": 297, "bbox_xyxy_normalized": [0.3894230769230769, 0.47291666666666665, 0.5961538461538461, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_002_reappear_02", "scene": "Volcano Observatory", "video": "videos/synthetic/syn_002.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a volcano monitoring terrace facing a dark lava slope. A steel guardrail, warning ribbon, sensor cables, and a low instrument cabinet occupy the terrace. A thin steam plume rises near the cabinet. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A gloved hand brings a handheld gas detector with its curved sampling probe into clear view, holds it in the foreground, then lowers the gas detector out of view. The view stays on the terrace and lava slope."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the terrace view until a concrete seismic sensor pillar with stacked isolation collars fills the near view beside the terrace guardrail. After holding that view, the viewpoint turns back to the opening terrace view."}, {"clip_id": "04", "clip_prompt": "A technician rolls a wheeled field spectrometer cart into clear view and into a measuring position on the terrace, then rolls the cart out of view. The view stays on the terrace and lava slope."}, {"clip_id": "05", "clip_prompt": "A first-person view from a volcano monitoring terrace facing a dark lava slope. A steel guardrail, warning ribbon, and an instrument cabinet stay in place. Steam keeps rising near the cabinet. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view from a volcano monitoring terrace facing a dark lava slope. Steam rises near an instrument cabinet, and cloud shadows drift across the slope. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical wheeled field spectrometer cart and the same technician from the preceding context. Treat the preceding video as their complete and authoritative visual reference. The action is explicit and continuous: the same technician naturally rolls the same wheeled field spectrometer cart back into clear view and into the same measuring position. Preserve the field spectrometer cart's exact instance identity, chassis and wheel geometry, dimensions, proportions, mast, sensor heads, safety frame, color layout, materials, texture, markings, surface details, scale, orientation, motion, and technician contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a narrow three-wheel field spectrometer with a warm ivory chassis, dark graphite wheel arches, a tall black sensor mast, twin copper-colored circular sensor heads, and a rust-orange safety hoop", "target_aliases": ["field spectrometer"], "references": [{"timestamp_seconds": 32.095, "frame_index": 770, "bbox_xyxy_normalized": [0.27403846153846156, 0.5583333333333333, 0.59375, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_002_revisit_01", "scene": "Volcano Observatory", "video": "videos/synthetic/syn_002.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a volcano monitoring terrace facing a dark lava slope. A steel guardrail, warning ribbon, sensor cables, and a low instrument cabinet occupy the terrace. A thin steam plume rises near the cabinet. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A gloved hand brings a handheld gas detector with its curved sampling probe into clear view, holds it in the foreground, then lowers the gas detector out of view. The view stays on the terrace and lava slope."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the terrace view until a concrete seismic sensor pillar with stacked isolation collars fills the near view beside the terrace guardrail. After holding that view, the viewpoint turns back to the opening terrace view."}, {"clip_id": "04", "clip_prompt": "A technician rolls a wheeled field spectrometer cart into clear view and into a measuring position on the terrace, then rolls the cart out of view. The view stays on the terrace and lava slope."}, {"clip_id": "05", "clip_prompt": "A first-person view from a volcano monitoring terrace facing a dark lava slope. A steel guardrail, warning ribbon, and an instrument cabinet stay in place. Steam keeps rising near the cabinet. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view from a volcano monitoring terrace facing a dark lava slope. Steam rises near an instrument cabinet, and cloud shadows drift across the slope. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed concrete seismic sensor pillar fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the sensor pillar, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a pale tapered concrete seismic sensor pillar with three broad burnt-orange ceramic isolation collars, a triangular service hatch, and a low charcoal cable conduit", "target_aliases": ["seismic sensor pillar"], "references": [{"timestamp_seconds": 24.111, "frame_index": 579, "bbox_xyxy_normalized": [0.5709134615384616, 0.18125, 0.8064903846153846, 0.9020833333333333]}]}
+{"type": "synthetic", "task_id": "syn_003_reappear_01", "scene": "Fossil Excavation", "video": "videos/synthetic/syn_003.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view in a desert excavation shelter facing gridded dig squares. A low sorting tray sits in the foreground. An excavation worker sits under the canvas in the background. The view stays still except for mild handheld sway. Canvas and sand move slightly."}, {"clip_id": "02", "clip_prompt": "An excavation assistant slides a fossil slab into clear view on the sorting area, holds it so the embedded fossil is visible, then moves the fossil slab out of view. The view stays in the desert excavation shelter."}, {"clip_id": "03", "clip_prompt": "A first-person seated view in a desert excavation shelter facing gridded dig squares and a sorting tray. An excavation worker sits under the canvas. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns left from the shelter view until a square survey flag with its circular target is centered on the tripod beside the excavation grid. After holding that view, the viewpoint turns back to the opening shelter view."}, {"clip_id": "05", "clip_prompt": "Hands unroll an excavation map with reinforced eyelets across the work surface into clear view, then roll the excavation map back up and out of the main view. The view stays in the desert excavation shelter."}, {"clip_id": "06", "clip_prompt": "A first-person seated view in a desert excavation shelter facing gridded dig squares and a sorting tray. An excavation worker sits under the canvas. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. The same excavation assistant slides the exact same physical fossil slab seen earlier back into clear view on the same sorting rail. Treat the preceding video as the complete and authoritative visual reference for this fossil slab. Match the fossil slab's exact instance identity and visible appearance from the preceding context. Maintain the established scene, spatial layout, lighting, perspective, viewpoint behavior, and visual style, with natural and temporally smooth motion.", "task_type": "reappear", "target_label": "a rust-red sandstone fossil slab with a large off-center cream ammonite spiral, a turquoise plaster support cradle, and one broad triangular missing corner", "target_aliases": ["fossil slab"], "references": [{"timestamp_seconds": 13.654, "frame_index": 328, "bbox_xyxy_normalized": [0.13221153846153846, 0.31875, 0.8894230769230769, 0.9375]}]}
+{"type": "synthetic", "task_id": "syn_003_reappear_02", "scene": "Fossil Excavation", "video": "videos/synthetic/syn_003.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view in a desert excavation shelter facing gridded dig squares. A low sorting tray sits in the foreground. An excavation worker sits under the canvas in the background. The view stays still except for mild handheld sway. Canvas and sand move slightly."}, {"clip_id": "02", "clip_prompt": "An excavation assistant slides a fossil slab into clear view on the sorting area, holds it so the embedded fossil is visible, then moves the fossil slab out of view. The view stays in the desert excavation shelter."}, {"clip_id": "03", "clip_prompt": "A first-person seated view in a desert excavation shelter facing gridded dig squares and a sorting tray. An excavation worker sits under the canvas. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns left from the shelter view until a square survey flag with its circular target is centered on the tripod beside the excavation grid. After holding that view, the viewpoint turns back to the opening shelter view."}, {"clip_id": "05", "clip_prompt": "Hands unroll an excavation map with reinforced eyelets across the work surface into clear view, then roll the excavation map back up and out of the main view. The view stays in the desert excavation shelter."}, {"clip_id": "06", "clip_prompt": "A first-person seated view in a desert excavation shelter facing gridded dig squares and a sorting tray. An excavation worker sits under the canvas. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical rolled map from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the rolled map. The action is explicit and continuous: the same hands naturally unroll the same rolled map into clear view. Preserve the rolled map's exact instance identity and the same map content as in the preceding video, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a waxed canvas excavation map with a broad terracotta grid, one large teal triangular repair patch, four brass corner eyelets, and cream binding along two edges", "target_aliases": ["excavation map"], "references": [{"timestamp_seconds": 42.895, "frame_index": 1029, "bbox_xyxy_normalized": [0.24158653846153846, 0.43125, 0.8341346153846154, 0.96875]}]}
+{"type": "synthetic", "task_id": "syn_003_revisit_01", "scene": "Fossil Excavation", "video": "videos/synthetic/syn_003.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view in a desert excavation shelter facing gridded dig squares. A low sorting tray sits in the foreground. An excavation worker sits under the canvas in the background. The view stays still except for mild handheld sway. Canvas and sand move slightly."}, {"clip_id": "02", "clip_prompt": "An excavation assistant slides a fossil slab into clear view on the sorting area, holds it so the embedded fossil is visible, then moves the fossil slab out of view. The view stays in the desert excavation shelter."}, {"clip_id": "03", "clip_prompt": "A first-person seated view in a desert excavation shelter facing gridded dig squares and a sorting tray. An excavation worker sits under the canvas. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns left from the shelter view until a square survey flag with its circular target is centered on the tripod beside the excavation grid. After holding that view, the viewpoint turns back to the opening shelter view."}, {"clip_id": "05", "clip_prompt": "Hands unroll an excavation map with reinforced eyelets across the work surface into clear view, then roll the excavation map back up and out of the main view. The view stays in the desert excavation shelter."}, {"clip_id": "06", "clip_prompt": "A first-person seated view in a desert excavation shelter facing gridded dig squares and a sorting tray. An excavation worker sits under the canvas. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed square survey flag fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the survey flag, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a quartered burnt-orange and warm-cream survey flag with a broad charcoal circular target, double-stitched edges, and two metal pole clips", "target_aliases": ["survey flag"], "references": [{"timestamp_seconds": 32.97, "frame_index": 791, "bbox_xyxy_normalized": [0.2644230769230769, 0.06041666666666667, 0.6706730769230769, 0.75625]}]}
+{"type": "synthetic", "task_id": "syn_004_reappear_01", "scene": "Cave Entrance", "video": "videos/synthetic/syn_004.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a tropical cave survey point facing a dark cave passage, a shallow stream, and hanging stalactites. A black handheld field recorder sits on a flat foreground rock. Ferns grow along the right rock wall. The view stays still except for mild handheld sway. Mist and stream water move slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the cave-passage view until a circular dish on a tripod fills the near view. After holding that view, the viewpoint turns back to the opening cave-passage view."}, {"clip_id": "03", "clip_prompt": "Hands bring a headlamp into clear view, hold it so the dark lamp housing, three cream lenses, and teal-and-rust-orange strap are visible, then take the headlamp out of view. The view stays on the cave passage, stream, and field recorder."}, {"clip_id": "04", "clip_prompt": "A cave surveyor walks in from the right into the cave passage, stands in clear view with a rope coil at the hip, then walks out to the left. The view stays on the stream and the foreground field recorder."}, {"clip_id": "05", "clip_prompt": "A first-person view at a tropical cave survey point facing the dark cave passage, shallow stream, and hanging stalactites. The black handheld field recorder remains on the foreground rock. The view stays still except for mild handheld sway. Mist and stream water continue."}, {"clip_id": "06", "clip_prompt": "A first-person view at a tropical cave survey point facing the cave passage, stream, and stalactites. The field recorder remains on the foreground rock. Ferns stay along the right wall. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical headlamp from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the headlamp. The action is explicit and continuous: the same hands naturally bring the same headlamp back into clear view. Preserve the headlamp's exact instance identity, lamp-housing and lens geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a caving headlamp with a dark graphite lamp housing, three large cream lenses, a broad woven strap in alternating teal and rust-orange blocks, and a brass side hinge", "target_aliases": ["caving headlamp"], "references": [{"timestamp_seconds": 23.878, "frame_index": 573, "bbox_xyxy_normalized": [0.2439903846153846, 0.3229166666666667, 0.8149038461538461, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_004_reappear_02", "scene": "Cave Entrance", "video": "videos/synthetic/syn_004.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a tropical cave survey point facing a dark cave passage, a shallow stream, and hanging stalactites. A black handheld field recorder sits on a flat foreground rock. Ferns grow along the right rock wall. The view stays still except for mild handheld sway. Mist and stream water move slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the cave-passage view until a circular dish on a tripod fills the near view. After holding that view, the viewpoint turns back to the opening cave-passage view."}, {"clip_id": "03", "clip_prompt": "Hands bring a headlamp into clear view, hold it so the dark lamp housing, three cream lenses, and teal-and-rust-orange strap are visible, then take the headlamp out of view. The view stays on the cave passage, stream, and field recorder."}, {"clip_id": "04", "clip_prompt": "A cave surveyor walks in from the right into the cave passage, stands in clear view with a rope coil at the hip, then walks out to the left. The view stays on the stream and the foreground field recorder."}, {"clip_id": "05", "clip_prompt": "A first-person view at a tropical cave survey point facing the dark cave passage, shallow stream, and hanging stalactites. The black handheld field recorder remains on the foreground rock. The view stays still except for mild handheld sway. Mist and stream water continue."}, {"clip_id": "06", "clip_prompt": "A first-person view at a tropical cave survey point facing the cave passage, stream, and stalactites. The field recorder remains on the foreground rock. Ferns stay along the right wall. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical cave surveyor from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the cave surveyor. The action is explicit and continuous: the same cave surveyor naturally walks in from the right into the established cave passage and into clear view. Preserve the cave surveyor's exact instance identity, helmet, coverall, chest harness, and rope coil, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and path. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a cave surveyor wearing an ochre helmet with a triple lamp, a slate-gray coverall, a broad teal chest harness, and a rust-orange rope coil secured at the hip", "target_aliases": ["cave surveyor"], "references": [{"timestamp_seconds": 34.781, "frame_index": 835, "bbox_xyxy_normalized": [0.4495192307692308, 0.00625, 0.6442307692307693, 0.66875]}]}
+{"type": "synthetic", "task_id": "syn_004_revisit_01", "scene": "Cave Entrance", "video": "videos/synthetic/syn_004.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a tropical cave survey point facing a dark cave passage, a shallow stream, and hanging stalactites. A black handheld field recorder sits on a flat foreground rock. Ferns grow along the right rock wall. The view stays still except for mild handheld sway. Mist and stream water move slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the cave-passage view until a circular dish on a tripod fills the near view. After holding that view, the viewpoint turns back to the opening cave-passage view."}, {"clip_id": "03", "clip_prompt": "Hands bring a headlamp into clear view, hold it so the dark lamp housing, three cream lenses, and teal-and-rust-orange strap are visible, then take the headlamp out of view. The view stays on the cave passage, stream, and field recorder."}, {"clip_id": "04", "clip_prompt": "A cave surveyor walks in from the right into the cave passage, stands in clear view with a rope coil at the hip, then walks out to the left. The view stays on the stream and the foreground field recorder."}, {"clip_id": "05", "clip_prompt": "A first-person view at a tropical cave survey point facing the dark cave passage, shallow stream, and hanging stalactites. The black handheld field recorder remains on the foreground rock. The view stays still except for mild handheld sway. Mist and stream water continue."}, {"clip_id": "06", "clip_prompt": "A first-person view at a tropical cave survey point facing the cave passage, stream, and stalactites. The field recorder remains on the foreground rock. Ferns stay along the right wall. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed sensor dish fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the sensor dish, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a compact acoustic survey sensor on a three-legged black tripod, with a broad honey-yellow circular dish, a recessed teal square receiver, and three cream vibration pads", "target_aliases": ["acoustic survey sensor"], "references": [{"timestamp_seconds": 15.174, "frame_index": 364, "bbox_xyxy_normalized": [0.2403846153846154, 0.22291666666666668, 0.5769230769230769, 0.9520833333333333]}]}
+{"type": "synthetic", "task_id": "syn_005_reappear_01", "scene": "Turtle Beach", "video": "videos/synthetic/syn_005.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a sea-turtle beach patrol station facing wet sand, a roped nest enclosure, a small wooden signpost, and the ocean. Footprints lead toward the water. The view stays still except for mild handheld sway. Small waves and sand reflections move slightly."}, {"clip_id": "02", "clip_prompt": "A patrol worker's hands raise a caliper into clear view, hold its curved jaws, hardwood handles, and brass pivot in the foreground, then lower the caliper out of view. The view stays on the roped nest enclosure and ocean."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the shoreline view until a sign stands centered on the sand, showing its cream board, sea-green arch, and burnt-orange turtle silhouette on a driftwood post. After holding that view, the viewpoint turns back to the opening shoreline view."}, {"clip_id": "04", "clip_prompt": "A pink crane walks in from the right beside the patrol marker, stands in clear view, spreads its wings, then walks out to the left. The view stays on the roped nest enclosure and ocean."}, {"clip_id": "05", "clip_prompt": "A first-person view from a sea-turtle beach patrol station facing wet sand, the roped nest enclosure, the small wooden signpost, and the ocean. The view stays still except for mild handheld sway. Small waves and sand reflections continue."}, {"clip_id": "06", "clip_prompt": "A first-person view from a sea-turtle beach patrol station facing wet sand, the roped nest enclosure, and the ocean. Footprints remain in the sand. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical caliper from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the caliper. The action is explicit and continuous: the same patrol worker's hands naturally bring the same caliper back into clear view. Preserve the caliper's exact instance identity, curved-jaw and handle geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a curved nest-measuring caliper with dark forged-steel jaws, two honey-colored hardwood handles, a wide teal leather wrist loop, and an oversized brass pivot disc", "target_aliases": ["measuring caliper"], "references": [{"timestamp_seconds": 14.264, "frame_index": 342, "bbox_xyxy_normalized": [0.1658653846153846, 0.12083333333333333, 0.8701923076923077, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_005_reappear_02", "scene": "Turtle Beach", "video": "videos/synthetic/syn_005.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a sea-turtle beach patrol station facing wet sand, a roped nest enclosure, a small wooden signpost, and the ocean. Footprints lead toward the water. The view stays still except for mild handheld sway. Small waves and sand reflections move slightly."}, {"clip_id": "02", "clip_prompt": "A patrol worker's hands raise a caliper into clear view, hold its curved jaws, hardwood handles, and brass pivot in the foreground, then lower the caliper out of view. The view stays on the roped nest enclosure and ocean."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the shoreline view until a sign stands centered on the sand, showing its cream board, sea-green arch, and burnt-orange turtle silhouette on a driftwood post. After holding that view, the viewpoint turns back to the opening shoreline view."}, {"clip_id": "04", "clip_prompt": "A pink crane walks in from the right beside the patrol marker, stands in clear view, spreads its wings, then walks out to the left. The view stays on the roped nest enclosure and ocean."}, {"clip_id": "05", "clip_prompt": "A first-person view from a sea-turtle beach patrol station facing wet sand, the roped nest enclosure, the small wooden signpost, and the ocean. The view stays still except for mild handheld sway. Small waves and sand reflections continue."}, {"clip_id": "06", "clip_prompt": "A first-person view from a sea-turtle beach patrol station facing wet sand, the roped nest enclosure, and the ocean. Footprints remain in the sand. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical pink crane from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the pink crane. The action is explicit and continuous: the same pink crane naturally walks in from the right beside the patrol marker and into clear view. Preserve the pink crane's exact instance identity, body and wing geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and path. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a tall pink crane with layered rose-pink body feathers, a deep crimson crown, broad black-and-white flight feathers, long matte-black legs, and a pale ivory pointed beak", "target_aliases": ["pink crane"], "references": [{"timestamp_seconds": 34.005, "frame_index": 816, "bbox_xyxy_normalized": [0.32091346153846156, 0.008333333333333333, 0.9543269230769231, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_005_revisit_01", "scene": "Turtle Beach", "video": "videos/synthetic/syn_005.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a sea-turtle beach patrol station facing wet sand, a roped nest enclosure, a small wooden signpost, and the ocean. Footprints lead toward the water. The view stays still except for mild handheld sway. Small waves and sand reflections move slightly."}, {"clip_id": "02", "clip_prompt": "A patrol worker's hands raise a caliper into clear view, hold its curved jaws, hardwood handles, and brass pivot in the foreground, then lower the caliper out of view. The view stays on the roped nest enclosure and ocean."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the shoreline view until a sign stands centered on the sand, showing its cream board, sea-green arch, and burnt-orange turtle silhouette on a driftwood post. After holding that view, the viewpoint turns back to the opening shoreline view."}, {"clip_id": "04", "clip_prompt": "A pink crane walks in from the right beside the patrol marker, stands in clear view, spreads its wings, then walks out to the left. The view stays on the roped nest enclosure and ocean."}, {"clip_id": "05", "clip_prompt": "A first-person view from a sea-turtle beach patrol station facing wet sand, the roped nest enclosure, the small wooden signpost, and the ocean. The view stays still except for mild handheld sway. Small waves and sand reflections continue."}, {"clip_id": "06", "clip_prompt": "A first-person view from a sea-turtle beach patrol station facing wet sand, the roped nest enclosure, and the ocean. Footprints remain in the sand. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed sign fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the sign, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a weathered cream nest-marker sign with a broad sea-green arch, a large burnt-orange turtle silhouette, two charcoal diagonal corner braces, and a forked driftwood post", "target_aliases": ["nest marker sign"], "references": [{"timestamp_seconds": 25.231, "frame_index": 606, "bbox_xyxy_normalized": [0.33413461538461536, 0.05, 0.6658653846153846, 0.5229166666666667]}]}
+{"type": "synthetic", "task_id": "syn_006_reappear_01", "scene": "Weather Station", "video": "videos/synthetic/syn_006.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view on a highland weather pad facing a grassy field and distant hills. A weather pole with an anemometer and a small flag stands in the foreground. The view stays still except for mild handheld sway. Grass and the flag move in the wind."}, {"clip_id": "02", "clip_prompt": "A weather technician lowers a radiosonde weather instrument into clear view by its suspension cords, holds it in the foreground, then lifts the radiosonde weather instrument back out of view. The view stays on the grassy field."}, {"clip_id": "03", "clip_prompt": "Gloved hands raise a portable cable reel loaded with a visible coil of cable into the foreground in an upright position, then lower the cable reel out of view. The view stays on the weather pole and grassy field."}, {"clip_id": "04", "clip_prompt": "A first-person view on a highland weather pad facing a weather pole, grassy field, and distant hills. The view stays still except for mild handheld sway. Grass and a small flag move in the wind."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns right from the weather-pole view until a helium cylinder stands in the grassy field. After holding that view, the viewpoint turns back to the opening weather-pole view."}, {"clip_id": "06", "clip_prompt": "A first-person view on a highland weather pad facing a weather pole and grassy field. The view stays still except for mild handheld sway. Grass and clouds keep moving slightly."}], "continue_prompt": "Continue the same coherent first-person video directly from its final frame. Use the preceding video as the complete visual reference for the same radiosonde weather instrument. At the start of the continuation, the same weather technician raises the same physical radiosonde weather instrument from the same launch cradle by its suspension cords, then lets the radiosonde weather instrument hang naturally and turn once. Reproduce the exact same physical radiosonde weather instrument from the preceding video. Make the radiosonde weather instrument match the preceding video in exact instance identity, overall form, proportions, materials, functional structure, visible attachments, scale, orientation, and natural interaction with the same technician. Preserve the established scene, spatial relationships, lighting, shadows, perspective, visual style, and continuous natural motion.", "task_type": "reappear", "target_label": "a compact radiosonde with an ivory vented foam body, a wide copper antenna coil, four teal suspension cords, and a pleated rust-orange foil tail", "target_aliases": ["radiosonde"], "references": [{"timestamp_seconds": 15.208, "frame_index": 365, "bbox_xyxy_normalized": [0.23197115384615385, 0.25833333333333336, 0.8125, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_006_reappear_02", "scene": "Weather Station", "video": "videos/synthetic/syn_006.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view on a highland weather pad facing a grassy field and distant hills. A weather pole with an anemometer and a small flag stands in the foreground. The view stays still except for mild handheld sway. Grass and the flag move in the wind."}, {"clip_id": "02", "clip_prompt": "A weather technician lowers a radiosonde weather instrument into clear view by its suspension cords, holds it in the foreground, then lifts the radiosonde weather instrument back out of view. The view stays on the grassy field."}, {"clip_id": "03", "clip_prompt": "Gloved hands raise a portable cable reel loaded with a visible coil of cable into the foreground in an upright position, then lower the cable reel out of view. The view stays on the weather pole and grassy field."}, {"clip_id": "04", "clip_prompt": "A first-person view on a highland weather pad facing a weather pole, grassy field, and distant hills. The view stays still except for mild handheld sway. Grass and a small flag move in the wind."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns right from the weather-pole view until a helium cylinder stands in the grassy field. After holding that view, the viewpoint turns back to the opening weather-pole view."}, {"clip_id": "06", "clip_prompt": "A first-person view on a highland weather pad facing a weather pole and grassy field. The view stays still except for mild handheld sway. Grass and clouds keep moving slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical portable cable reel loaded with a visible coil of cable between its two solid side plates from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the cable reel. The continuation opens as the same gloved hands naturally raise the same portable cable reel loaded with its visible coil of cable back into the foreground in an upright position. Preserve the cable reel's exact instance identity, side-plate and hub geometry, dimensions, proportions, wound cable, repair details, side handle, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a portable weather cable reel with two laminated ash-wood side discs, a broad rust-orange hexagonal hub, thick teal cable, and one wide black woven repair sleeve", "target_aliases": ["cable reel"], "references": [{"timestamp_seconds": 24.81, "frame_index": 595, "bbox_xyxy_normalized": [0.24639423076923078, 0.09791666666666667, 0.8329326923076923, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_006_revisit_01", "scene": "Weather Station", "video": "videos/synthetic/syn_006.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view on a highland weather pad facing a grassy field and distant hills. A weather pole with an anemometer and a small flag stands in the foreground. The view stays still except for mild handheld sway. Grass and the flag move in the wind."}, {"clip_id": "02", "clip_prompt": "A weather technician lowers a radiosonde weather instrument into clear view by its suspension cords, holds it in the foreground, then lifts the radiosonde weather instrument back out of view. The view stays on the grassy field."}, {"clip_id": "03", "clip_prompt": "Gloved hands raise a portable cable reel loaded with a visible coil of cable into the foreground in an upright position, then lower the cable reel out of view. The view stays on the weather pole and grassy field."}, {"clip_id": "04", "clip_prompt": "A first-person view on a highland weather pad facing a weather pole, grassy field, and distant hills. The view stays still except for mild handheld sway. Grass and a small flag move in the wind."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns right from the weather-pole view until a helium cylinder stands in the grassy field. After holding that view, the viewpoint turns back to the opening weather-pole view."}, {"clip_id": "06", "clip_prompt": "A first-person view on a highland weather pad facing a weather pole and grassy field. The view stays still except for mild handheld sway. Grass and clouds keep moving slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed helium cylinder fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the helium cylinder, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a tall weathered teal helium cylinder with two broad warm-yellow protective collars, a cream valve cage, and a rust-orange braided securing strap", "target_aliases": ["helium cylinder"], "references": [{"timestamp_seconds": 45.452, "frame_index": 1091, "bbox_xyxy_normalized": [0.4098557692307692, 0.041666666666666664, 0.6382211538461539, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_007_reappear_01", "scene": "Apple Orchard", "video": "videos/synthetic/syn_007.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a covered apple-orchard grading kiosk facing a metal sorting table, wooden apple crates, and orchard rows beyond the open front. White tags hang from the rafters. The view stays still except for mild handheld sway. Leaves and hanging tags move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view from a covered apple-orchard grading kiosk facing the metal sorting table, wooden apple crates, and orchard rows. The view stays still except for mild handheld sway. Leaves and hanging tags continue to move slightly."}, {"clip_id": "03", "clip_prompt": "An orchard worker's hands bring a pair of pruning shears into clear view, cut a sample twig, then lower the pruning shears out of view. The view stays on the apple crates and orchard rows."}, {"clip_id": "04", "clip_prompt": "A first-person view from a covered apple-orchard grading kiosk facing the metal sorting table, wooden apple crates, and orchard rows. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "An orchard dog walks in from the right, stands in clear view near the metal sorting table, then leaves through the right opening. The view stays on the grading table and orchard rows."}, {"clip_id": "06", "clip_prompt": "A first-person view from a covered apple-orchard grading kiosk facing the metal sorting table, wooden apple crates, and orchard rows. The view stays still except for mild handheld sway. Leaves and hanging tags move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical pruning shears from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the pruning shears. The action is explicit and continuous: the same orchard worker's hands naturally bring the same pruning shears back into clear view and use them on a sample twig. Preserve the pruning shears's exact instance identity, blade and handle geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "forged pruning shears with a dark hook-shaped steel blade, two honey-colored hardwood handles, a wide teal leather wrist loop, and an oversized brass pivot", "target_aliases": ["pruning shears"], "references": [{"timestamp_seconds": 23.703, "frame_index": 569, "bbox_xyxy_normalized": [0.32091346153846156, 0.26666666666666666, 1.0, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_007_reappear_02", "scene": "Apple Orchard", "video": "videos/synthetic/syn_007.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a covered apple-orchard grading kiosk facing a metal sorting table, wooden apple crates, and orchard rows beyond the open front. White tags hang from the rafters. The view stays still except for mild handheld sway. Leaves and hanging tags move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view from a covered apple-orchard grading kiosk facing the metal sorting table, wooden apple crates, and orchard rows. The view stays still except for mild handheld sway. Leaves and hanging tags continue to move slightly."}, {"clip_id": "03", "clip_prompt": "An orchard worker's hands bring a pair of pruning shears into clear view, cut a sample twig, then lower the pruning shears out of view. The view stays on the apple crates and orchard rows."}, {"clip_id": "04", "clip_prompt": "A first-person view from a covered apple-orchard grading kiosk facing the metal sorting table, wooden apple crates, and orchard rows. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "An orchard dog walks in from the right, stands in clear view near the metal sorting table, then leaves through the right opening. The view stays on the grading table and orchard rows."}, {"clip_id": "06", "clip_prompt": "A first-person view from a covered apple-orchard grading kiosk facing the metal sorting table, wooden apple crates, and orchard rows. The view stays still except for mild handheld sway. Leaves and hanging tags move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical orchard dog from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the orchard dog. The action is explicit and continuous: the same orchard dog naturally walks in from the right and into clear view. Preserve the orchard dog's exact instance identity, body geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and path. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "one medium brindle orchard dog with upright black ears, a cream chest and muzzle, a teal working collar, and a naturally pale tail tip", "target_aliases": ["orchard dog", "dog"], "references": [{"timestamp_seconds": 43.637, "frame_index": 1047, "bbox_xyxy_normalized": [0.32572115384615385, 0.3625, 0.7716346153846154, 0.9916666666666667]}]}
+{"type": "synthetic", "task_id": "syn_008_reappear_01", "scene": "Rice Terraces", "video": "videos/synthetic/syn_008.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a rice-terrace irrigation sluice facing a narrow ditch, a wooden sluice structure, flooded green paddies on the left, and a tilled brown field on the right. Distant hills sit under a bright sky. The view stays still except for mild handheld sway. Water reflections move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at a rice-terrace irrigation sluice facing the ditch, wooden sluice, flooded paddies, and tilled field. The view stays still except for mild handheld sway. Water reflections continue."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the terrace view until a large handwheel is centered on the concrete sluice face, showing its teal spokes, cream rim, brass hub, and rust-orange wooden grip. After holding that view, the viewpoint turns back to the opening terrace view."}, {"clip_id": "04", "clip_prompt": "A field worker's hands bring a ruler into clear view in the foreground, hold its cream face, teal triangular float, and wooden grip, then lower the ruler out of view. The view stays on the rice terraces."}, {"clip_id": "05", "clip_prompt": "A field worker carries a basket of rice seedlings across the foreground from right to left, then takes the basket out of view to the left. The view stays on the rice terraces."}, {"clip_id": "06", "clip_prompt": "A first-person view at a rice-terrace irrigation sluice facing the ditch, flooded paddies, tilled field, and distant hills. The view stays still except for mild handheld sway. Water reflections move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical ruler from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the ruler. The action is explicit and continuous: the same field worker's hands naturally bring the same ruler back into clear view. Preserve the ruler's exact instance identity, face and float geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a water-depth ruler with a cream enamel face, oversized raised brass numerals, a broad teal triangular float, a honey-colored wooden grip, and a dark graphite lower tip", "target_aliases": ["water-depth ruler"], "references": [{"timestamp_seconds": 33.421, "frame_index": 802, "bbox_xyxy_normalized": [0.2980769230769231, 0.0, 0.6634615384615384, 0.99375]}]}
+{"type": "synthetic", "task_id": "syn_008_reappear_02", "scene": "Rice Terraces", "video": "videos/synthetic/syn_008.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a rice-terrace irrigation sluice facing a narrow ditch, a wooden sluice structure, flooded green paddies on the left, and a tilled brown field on the right. Distant hills sit under a bright sky. The view stays still except for mild handheld sway. Water reflections move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at a rice-terrace irrigation sluice facing the ditch, wooden sluice, flooded paddies, and tilled field. The view stays still except for mild handheld sway. Water reflections continue."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the terrace view until a large handwheel is centered on the concrete sluice face, showing its teal spokes, cream rim, brass hub, and rust-orange wooden grip. After holding that view, the viewpoint turns back to the opening terrace view."}, {"clip_id": "04", "clip_prompt": "A field worker's hands bring a ruler into clear view in the foreground, hold its cream face, teal triangular float, and wooden grip, then lower the ruler out of view. The view stays on the rice terraces."}, {"clip_id": "05", "clip_prompt": "A field worker carries a basket of rice seedlings across the foreground from right to left, then takes the basket out of view to the left. The view stays on the rice terraces."}, {"clip_id": "06", "clip_prompt": "A first-person view at a rice-terrace irrigation sluice facing the ditch, flooded paddies, tilled field, and distant hills. The view stays still except for mild handheld sway. Water reflections move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical rice-seedling basket from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the rice-seedling basket. The action is explicit and continuous: the same field worker naturally carries the same rice-seedling basket back across the foreground and into clear view. Preserve the rice-seedling basket's exact instance identity, basket and strap geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a bound rice-seedling mat with dense green shoots, a dark woven reed root base, two broad diagonal rust-orange ties, and a thick cream edge cord", "target_aliases": ["rice-seedling mat"], "references": [{"timestamp_seconds": 43.288, "frame_index": 1039, "bbox_xyxy_normalized": [0.08413461538461539, 0.08541666666666667, 0.9759615384615384, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_008_revisit_01", "scene": "Rice Terraces", "video": "videos/synthetic/syn_008.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a rice-terrace irrigation sluice facing a narrow ditch, a wooden sluice structure, flooded green paddies on the left, and a tilled brown field on the right. Distant hills sit under a bright sky. The view stays still except for mild handheld sway. Water reflections move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at a rice-terrace irrigation sluice facing the ditch, wooden sluice, flooded paddies, and tilled field. The view stays still except for mild handheld sway. Water reflections continue."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the terrace view until a large handwheel is centered on the concrete sluice face, showing its teal spokes, cream rim, brass hub, and rust-orange wooden grip. After holding that view, the viewpoint turns back to the opening terrace view."}, {"clip_id": "04", "clip_prompt": "A field worker's hands bring a ruler into clear view in the foreground, hold its cream face, teal triangular float, and wooden grip, then lower the ruler out of view. The view stays on the rice terraces."}, {"clip_id": "05", "clip_prompt": "A field worker carries a basket of rice seedlings across the foreground from right to left, then takes the basket out of view to the left. The view stays on the rice terraces."}, {"clip_id": "06", "clip_prompt": "A first-person view at a rice-terrace irrigation sluice facing the ditch, flooded paddies, tilled field, and distant hills. The view stays still except for mild handheld sway. Water reflections move slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed handwheel fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the handwheel, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a large cast-iron irrigation handwheel with weathered teal enamel spokes, a broad warm-cream outer rim, an oversized brass hub, and one rust-orange wooden grip", "target_aliases": ["irrigation handwheel"], "references": [{"timestamp_seconds": 25.205, "frame_index": 605, "bbox_xyxy_normalized": [0.3401442307692308, 0.16875, 0.7463942307692307, 0.8916666666666667]}]}
+{"type": "synthetic", "task_id": "syn_009_reappear_01", "scene": "Tea Garden", "video": "videos/synthetic/syn_009.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view under a mountain tea-garden weighing shelter facing rows of tea bushes, a hanging circular scale pan, and a long bamboo-screen wall on the right. Woven baskets sit near a wooden table farther down the concrete walkway. A worker remains in the background. The view stays still except for mild handheld sway. Tea leaves and the empty scale pan move slightly."}, {"clip_id": "02", "clip_prompt": "A tea picker carries a tea-picking basket filled with leaves to the hanging scale, sets the tea-picking basket on the weighing pan, then lifts it and carries it out of the near view. The view stays on the tea rows and the bamboo-screen wall."}, {"clip_id": "03", "clip_prompt": "A first-person view under a mountain tea-garden weighing shelter facing the hanging scale pan, the tea rows on the left, and the bamboo-screen wall on the right. A worker remains farther down the walkway near the table and baskets. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the walkway view until a hooded raincoat hanging on the wall fills the near view, showing its yellow body, red chest patch, and dark green hood lining. After holding that view, the viewpoint turns back to the opening scale-and-tea-row view."}, {"clip_id": "05", "clip_prompt": "A first-person view under a mountain tea-garden weighing shelter facing the hanging scale pan, the tea rows, and the bamboo-screen wall. A worker remains in the background near the table. The view stays still except for mild handheld sway. Tea leaves and scale-pan reflections move slightly."}, {"clip_id": "06", "clip_prompt": "A first-person view under a mountain tea-garden weighing shelter facing the empty hanging scale pan, the tea rows, and the bamboo-screen wall. Baskets remain near the table farther down the walkway. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical tea-picking basket from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the tea-picking basket. The action is explicit and continuous: the same tea picker naturally carries the same tea-picking basket back onto the hanging scale and into clear view. Preserve the tea-picking basket's exact instance identity, basket geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and picker contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a woven mountain tea basket with a dark willow body, a broad ochre reed rim, a teal cloth shoulder loop, and fresh tea leaves spilling naturally above the rim", "target_aliases": ["tea-picking basket"], "references": [{"timestamp_seconds": 15.629, "frame_index": 375, "bbox_xyxy_normalized": [0.37259615384615385, 0.46041666666666664, 0.5588942307692307, 0.7895833333333333]}]}
+{"type": "synthetic", "task_id": "syn_009_revisit_01", "scene": "Tea Garden", "video": "videos/synthetic/syn_009.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view under a mountain tea-garden weighing shelter facing rows of tea bushes, a hanging circular scale pan, and a long bamboo-screen wall on the right. Woven baskets sit near a wooden table farther down the concrete walkway. A worker remains in the background. The view stays still except for mild handheld sway. Tea leaves and the empty scale pan move slightly."}, {"clip_id": "02", "clip_prompt": "A tea picker carries a tea-picking basket filled with leaves to the hanging scale, sets the tea-picking basket on the weighing pan, then lifts it and carries it out of the near view. The view stays on the tea rows and the bamboo-screen wall."}, {"clip_id": "03", "clip_prompt": "A first-person view under a mountain tea-garden weighing shelter facing the hanging scale pan, the tea rows on the left, and the bamboo-screen wall on the right. A worker remains farther down the walkway near the table and baskets. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the walkway view until a hooded raincoat hanging on the wall fills the near view, showing its yellow body, red chest patch, and dark green hood lining. After holding that view, the viewpoint turns back to the opening scale-and-tea-row view."}, {"clip_id": "05", "clip_prompt": "A first-person view under a mountain tea-garden weighing shelter facing the hanging scale pan, the tea rows, and the bamboo-screen wall. A worker remains in the background near the table. The view stays still except for mild handheld sway. Tea leaves and scale-pan reflections move slightly."}, {"clip_id": "06", "clip_prompt": "A first-person view under a mountain tea-garden weighing shelter facing the empty hanging scale pan, the tea rows, and the bamboo-screen wall. Baskets remain near the table farther down the walkway. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed hooded raincoat fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the hooded raincoat, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a vivid mustard-yellow hooded raincoat with one large red square repair patch bordered by cream stitches, two navy toggle fasteners, and a dark green hood lining", "target_aliases": ["hooded raincoat"], "references": [{"timestamp_seconds": 34.14, "frame_index": 819, "bbox_xyxy_normalized": [0.33774038461538464, 0.004166666666666667, 0.7692307692307693, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_010_reappear_01", "scene": "Sheep Farm", "video": "videos/synthetic/syn_010.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a sheep sorting yard facing timber rails, a muddy handling pen, and a grassy hill under a cloudy sky. A wire fence runs along the left. The view stays still except for mild handheld sway. Hill grass and clouds move slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the pen view until a wooden sorting gate fills the near view, showing its horizontal planks and yellow plate. After holding that view, the viewpoint turns back to the opening yard view."}, {"clip_id": "03", "clip_prompt": "Hands bring a wool comb into clear view, pick wool from the teeth, put the wool into a pouch on the fence, then lower the wool comb out of the main view. The view stays on the timber rails and grassy hill."}, {"clip_id": "04", "clip_prompt": "A first-person view at a sheep sorting yard facing the timber rails, muddy pen, and grassy hill. A small red marker hangs on a fence post. The view stays still except for mild handheld sway. Grass and clouds continue to move slightly."}, {"clip_id": "05", "clip_prompt": "A first-person view at a sheep sorting yard facing the timber rails, muddy handling lane, and grassy hill. Distant sheep remain on the hillside. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view at a sheep sorting yard facing the timber rails, muddy pen, and grassy hill under the cloudy sky. The view stays still except for mild handheld sway. Hill grass and clouds move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical wool comb from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the wool comb. The action is explicit and continuous: the same hands naturally bring the same wool comb back into clear view. Preserve the wool comb's exact instance identity, comb and tooth geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a silver wool comb with staggered steel teeth, a red-and-cream turned ash handle, and lanolin-darkened grooves near the grip", "target_aliases": ["wool comb"], "references": [{"timestamp_seconds": 23.591, "frame_index": 566, "bbox_xyxy_normalized": [0.3125, 0.26458333333333334, 0.9026442307692307, 0.85625]}]}
+{"type": "synthetic", "task_id": "syn_010_revisit_01", "scene": "Sheep Farm", "video": "videos/synthetic/syn_010.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a sheep sorting yard facing timber rails, a muddy handling pen, and a grassy hill under a cloudy sky. A wire fence runs along the left. The view stays still except for mild handheld sway. Hill grass and clouds move slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the pen view until a wooden sorting gate fills the near view, showing its horizontal planks and yellow plate. After holding that view, the viewpoint turns back to the opening yard view."}, {"clip_id": "03", "clip_prompt": "Hands bring a wool comb into clear view, pick wool from the teeth, put the wool into a pouch on the fence, then lower the wool comb out of the main view. The view stays on the timber rails and grassy hill."}, {"clip_id": "04", "clip_prompt": "A first-person view at a sheep sorting yard facing the timber rails, muddy pen, and grassy hill. A small red marker hangs on a fence post. The view stays still except for mild handheld sway. Grass and clouds continue to move slightly."}, {"clip_id": "05", "clip_prompt": "A first-person view at a sheep sorting yard facing the timber rails, muddy handling lane, and grassy hill. Distant sheep remain on the hillside. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view at a sheep sorting yard facing the timber rails, muddy pen, and grassy hill under the cloudy sky. The view stays still except for mild handheld sway. Hill grass and clouds move slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed sorting gate fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the sorting gate, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a blue timber sorting gate with a broad yellow diamond plate, worn iron hinge straps, and a small rubbed patch near the latch", "target_aliases": ["sorting gate"], "references": [{"timestamp_seconds": 13.907, "frame_index": 334, "bbox_xyxy_normalized": [0.3485576923076923, 0.29375, 0.7451923076923077, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_011_reappear_01", "scene": "Salt Ponds", "video": "videos/synthetic/syn_011.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a salt-pond platform under a canopy, facing a wooden walkway and evaporation ponds. A sample rack sits on the walkway. The view stays still except for mild handheld sway. Water reflections and clouds move slowly."}, {"clip_id": "02", "clip_prompt": "A first-person view from a salt-pond platform under a canopy, facing a wooden walkway and evaporation ponds. A sample rack sits on the walkway. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the walkway view until a salt wheelbarrow sits on the wooden platform beside the ponds. After holding that view, the viewpoint turns back to the opening walkway view."}, {"clip_id": "04", "clip_prompt": "A salt technician raises a cylindrical brine sample bottle with its screw cap from the sample rack into clear view, holds it, then lowers the brine sample bottle out of view. The view stays on the walkway and ponds."}, {"clip_id": "05", "clip_prompt": "A first-person view from a salt-pond platform under a canopy, facing a wooden walkway and evaporation ponds. The view stays still except for mild handheld sway. Water reflections continue."}, {"clip_id": "06", "clip_prompt": "A first-person view from a salt-pond platform under a canopy, facing a wooden walkway and evaporation ponds. A sample rack sits on the walkway. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical clear cylindrical brine sample bottle from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the brine sample bottle. The action is explicit and continuous: the same hand naturally raises the same clear cylindrical brine sample bottle from the sample rack back into clear view. Preserve the brine sample bottle's exact instance identity, bottle and closure geometry, dimensions, proportions, fill level, band layout, materials, transparency, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a clear brine sample bottle with a thick glass shoulder, a teal measurement band, a cork stopper held by a brass wire loop, and salt crust around its base", "target_aliases": ["brine sample bottle"], "references": [{"timestamp_seconds": 32.274, "frame_index": 775, "bbox_xyxy_normalized": [0.3389423076923077, 0.035416666666666666, 0.6550480769230769, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_012_reappear_01", "scene": "Shellfish Hatchery", "video": "videos/synthetic/syn_012.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view down a shellfish-hatchery aisle facing a stainless work table with plastic bins on the left and a row of water tanks with pipes and hoses on the right. A doorway stands at the far end. The view stays still except for mild handheld sway. Tank water ripples slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view down a shellfish-hatchery aisle facing the work table, bins, water tanks, and far doorway. The view stays still except for mild handheld sway. Water in the tanks continues to move."}, {"clip_id": "03", "clip_prompt": "A first-person view down a shellfish-hatchery aisle facing the stainless table, bins, and aerated tanks. The view stays still except for mild handheld sway. Bubbles and surface ripples continue in the tanks."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the aisle view until an oxygen cylinder beside the tanks fills the near view, showing its grey body, red valve wheel, and connected hoses. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "05", "clip_prompt": "A hatchery worker brings a scoop loaded with shellfish into clear view, empties it into a tank, then takes the scoop out of view. The view stays on the hatchery aisle."}, {"clip_id": "06", "clip_prompt": "A first-person view down a shellfish-hatchery aisle facing the work table with bins, the water tanks, and the far doorway. The view stays still except for mild handheld sway. Tank water ripples slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical scoop from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the scoop. The action is explicit and continuous: the same hatchery worker naturally brings the same scoop back into clear view and pours into the tank. Preserve the scoop's exact instance identity, scoop and handle geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a shellfish grading scoop with a perforated stainless bowl, a short driftwood handle, a teal silicone grip sleeve, and wet shell fragments clinging to its rim", "target_aliases": ["shellfish grading scoop"], "references": [{"timestamp_seconds": 42.521, "frame_index": 1021, "bbox_xyxy_normalized": [0.4326923076923077, 0.54375, 0.7439903846153846, 0.9104166666666667]}]}
+{"type": "synthetic", "task_id": "syn_013_reappear_01", "scene": "Wind Turbine", "video": "videos/synthetic/syn_013.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a wind-turbine base facing the white tower, a concrete pad, and a grey equipment cabinet. Grass, a fence, and distant turbines fill the background. The view stays still except for mild handheld sway. Grass and clouds move slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns left from the cabinet view until a rescue stretcher hanging on the chain-link fence fills the near view, showing its yellow board, red straps, and blue emblem. After holding that view, the viewpoint turns back to the opening turbine-base view."}, {"clip_id": "03", "clip_prompt": "Hands raise a torque wrench into clear view, hold and check it in the foreground, then lower the torque wrench out of view. The view stays on the turbine base and equipment cabinet."}, {"clip_id": "04", "clip_prompt": "A first-person view at a wind-turbine base facing the white tower, concrete pad, and grey equipment cabinet. Distant turbines stand in the grassy field. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "A first-person view at a wind-turbine base facing the equipment cabinet, concrete pad, and white tower. The view stays still except for mild handheld sway. Grass and clouds continue to move slightly."}, {"clip_id": "06", "clip_prompt": "A first-person view at a wind-turbine base facing the white tower, concrete pad, grey equipment cabinet, and distant turbines. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical torque wrench from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the torque wrench. The action is explicit and continuous: the same hands naturally bring the same torque wrench back into clear view. Preserve the torque wrench's exact instance identity, wrench geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a silver torque wrench with a green checked rubber handle, a long narrow shaft, a black adjustment collar, and light grease around the square drive", "target_aliases": ["torque wrench"], "references": [{"timestamp_seconds": 29.014, "frame_index": 696, "bbox_xyxy_normalized": [0.49278846153846156, 0.21875, 0.6466346153846154, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_013_revisit_01", "scene": "Wind Turbine", "video": "videos/synthetic/syn_013.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a wind-turbine base facing the white tower, a concrete pad, and a grey equipment cabinet. Grass, a fence, and distant turbines fill the background. The view stays still except for mild handheld sway. Grass and clouds move slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns left from the cabinet view until a rescue stretcher hanging on the chain-link fence fills the near view, showing its yellow board, red straps, and blue emblem. After holding that view, the viewpoint turns back to the opening turbine-base view."}, {"clip_id": "03", "clip_prompt": "Hands raise a torque wrench into clear view, hold and check it in the foreground, then lower the torque wrench out of view. The view stays on the turbine base and equipment cabinet."}, {"clip_id": "04", "clip_prompt": "A first-person view at a wind-turbine base facing the white tower, concrete pad, and grey equipment cabinet. Distant turbines stand in the grassy field. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "A first-person view at a wind-turbine base facing the equipment cabinet, concrete pad, and white tower. The view stays still except for mild handheld sway. Grass and clouds continue to move slightly."}, {"clip_id": "06", "clip_prompt": "A first-person view at a wind-turbine base facing the white tower, concrete pad, grey equipment cabinet, and distant turbines. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed rescue stretcher fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the rescue stretcher, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a bright yellow turbine rescue stretcher with a large blue star-of-life emblem, three broad red securing straps, silver tubular side rails, and black carrying grips", "target_aliases": ["rescue stretcher"], "references": [{"timestamp_seconds": 13.147, "frame_index": 316, "bbox_xyxy_normalized": [0.21875, 0.22291666666666668, 0.5625, 0.5270833333333333]}]}
+{"type": "synthetic", "task_id": "syn_014_reappear_01", "scene": "Railway Signal", "video": "videos/synthetic/syn_014.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a rail signal point facing two tracks, a tall signal post, a grey signal box, and a wooden fence under a cloudy sky. The view stays still except for mild handheld sway. Grass and clouds move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at a rail signal point facing the tracks, signal post, grey signal box, and wooden fence. The view stays still except for mild handheld sway. Clouds and roadside grass continue to move slightly."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the track view until a signal arm on the signal post fills the near view, showing the horizontal arm with its red-and-white end plate. After holding that view, the viewpoint turns back to the opening track view."}, {"clip_id": "04", "clip_prompt": "A technician's hands bring a key tag into clear view and hang it on the interior metal bar, then leave the view. The view later looks back toward the railway tracks."}, {"clip_id": "05", "clip_prompt": "A first-person view at a rail signal point facing the tracks, signal post, grey signal box, and wooden fence. The view stays still except for mild handheld sway. Clouds and grass move slightly."}, {"clip_id": "06", "clip_prompt": "A first-person view at a rail signal point facing the tracks, signal post, and grey signal box under the cloudy sky. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical key tag from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the key tag. The action is explicit and continuous: the same technician naturally brings the same key tag back into clear view and hangs it in the open signal box. Preserve the key tag's exact instance identity, tag and ring geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a green signal-box key tag with a yellow directional arrow, a punched brass eyelet, a short black cord, and grime polished around its edge", "target_aliases": ["signal-box key tag"], "references": [{"timestamp_seconds": 37.586, "frame_index": 902, "bbox_xyxy_normalized": [0.5228365384615384, 0.29791666666666666, 0.6346153846153846, 0.68125]}]}
+{"type": "synthetic", "task_id": "syn_014_revisit_01", "scene": "Railway Signal", "video": "videos/synthetic/syn_014.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a rail signal point facing two tracks, a tall signal post, a grey signal box, and a wooden fence under a cloudy sky. The view stays still except for mild handheld sway. Grass and clouds move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at a rail signal point facing the tracks, signal post, grey signal box, and wooden fence. The view stays still except for mild handheld sway. Clouds and roadside grass continue to move slightly."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the track view until a signal arm on the signal post fills the near view, showing the horizontal arm with its red-and-white end plate. After holding that view, the viewpoint turns back to the opening track view."}, {"clip_id": "04", "clip_prompt": "A technician's hands bring a key tag into clear view and hang it on the interior metal bar, then leave the view. The view later looks back toward the railway tracks."}, {"clip_id": "05", "clip_prompt": "A first-person view at a rail signal point facing the tracks, signal post, grey signal box, and wooden fence. The view stays still except for mild handheld sway. Clouds and grass move slightly."}, {"clip_id": "06", "clip_prompt": "A first-person view at a rail signal point facing the tracks, signal post, and grey signal box under the cloudy sky. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed signal arm fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the signal arm, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a red mechanical signal arm with a broad white circular end plate, chipped enamel along its pivot, and a visible brass counterweight", "target_aliases": ["signal arm"], "references": [{"timestamp_seconds": 25.518, "frame_index": 612, "bbox_xyxy_normalized": [0.4074519230769231, 0.004166666666666667, 0.7067307692307693, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_015_reappear_01", "scene": "Lighthouse", "video": "videos/synthetic/syn_015.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view on a lighthouse gallery facing the curved white tower wall, a black railing, and the open ocean. An orange equipment bag rests on the gallery floor under a yellow wall sign. The view stays still except for mild handheld sway. Sea surface and clouds move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view on a lighthouse gallery facing the white tower wall, black railing, orange equipment bag, and ocean. The view stays still except for mild handheld sway. Water reflections continue."}, {"clip_id": "03", "clip_prompt": "A first-person view on a lighthouse gallery facing the curved white wall, the orange equipment bag, the black railing, and the ocean. The view stays still except for mild handheld sway. Sea surface and clouds move slightly."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns left from the gallery view until a bell in its white frame fills the near view, showing the dark bell hanging from a yellow yoke. After holding that view, the viewpoint turns back to the opening gallery view."}, {"clip_id": "05", "clip_prompt": "A lighthouse keeper's hands raise a folder into clear view, open it, then close the folder and lower it out of view. The view stays on the lighthouse gallery and ocean."}, {"clip_id": "06", "clip_prompt": "A first-person view on a lighthouse gallery facing the white tower wall, orange equipment bag, black railing, and ocean. The view stays still except for mild handheld sway. Sea surface and clouds move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical folder from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the folder. The action is explicit and continuous: the same lighthouse keeper naturally brings the same folder back into clear view. Preserve the folder's exact instance identity, folder geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a brick-red waterproof maintenance log folder with a broad cream anchor stencil, four black rubber corner guards, a brass snap clasp, and natural salt speckles along its cover edge", "target_aliases": ["maintenance log folder"], "references": [{"timestamp_seconds": 42.61, "frame_index": 1023, "bbox_xyxy_normalized": [0.35096153846153844, 0.3770833333333333, 0.71875, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_015_revisit_01", "scene": "Lighthouse", "video": "videos/synthetic/syn_015.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view on a lighthouse gallery facing the curved white tower wall, a black railing, and the open ocean. An orange equipment bag rests on the gallery floor under a yellow wall sign. The view stays still except for mild handheld sway. Sea surface and clouds move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view on a lighthouse gallery facing the white tower wall, black railing, orange equipment bag, and ocean. The view stays still except for mild handheld sway. Water reflections continue."}, {"clip_id": "03", "clip_prompt": "A first-person view on a lighthouse gallery facing the curved white wall, the orange equipment bag, the black railing, and the ocean. The view stays still except for mild handheld sway. Sea surface and clouds move slightly."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns left from the gallery view until a bell in its white frame fills the near view, showing the dark bell hanging from a yellow yoke. After holding that view, the viewpoint turns back to the opening gallery view."}, {"clip_id": "05", "clip_prompt": "A lighthouse keeper's hands raise a folder into clear view, open it, then close the folder and lower it out of view. The view stays on the lighthouse gallery and ocean."}, {"clip_id": "06", "clip_prompt": "A first-person view on a lighthouse gallery facing the white tower wall, orange equipment bag, black railing, and ocean. The view stays still except for mild handheld sway. Sea surface and clouds move slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed bell fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the bell, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a blue fog bell with a broad yellow rim, a salt-faded clapper rope, and three pale corrosion spots on its cast-metal shoulder", "target_aliases": ["fog bell"], "references": [{"timestamp_seconds": 34.152, "frame_index": 820, "bbox_xyxy_normalized": [0.3016826923076923, 0.05625, 0.6370192307692307, 0.5708333333333333]}]}
+{"type": "synthetic", "task_id": "syn_016_reappear_01", "scene": "Archery Range", "video": "videos/synthetic/syn_016.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in an indoor archery equipment alcove facing a pale masonry wall, a bolted leather-equipment rack on the left, a gray drawer cabinet and slim work shelf on the right, and a clear polished floor. A numbered inspection tag sits on the back wall under a high ventilation grille. The view stays still except for mild handheld sway. Floor reflections drift slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the equipment-alcove view until an archery target stands at the far end of the indoor lane. After holding that view, the viewpoint turns back to the opening alcove view."}, {"clip_id": "03", "clip_prompt": "Hands bring an arrow quiver into clear view, hold its leather pockets and blue-fletched arrows in the foreground, then take the arrow quiver out of view. The view stays on the equipment wall, work shelf, and polished floor."}, {"clip_id": "04", "clip_prompt": "A first-person view in an indoor archery equipment alcove facing the masonry wall, leather-equipment rack, gray cabinet, and work shelf. The view stays still except for mild handheld sway. Floor reflections continue."}, {"clip_id": "05", "clip_prompt": "A first-person view in an indoor archery equipment alcove facing the masonry wall, leather-equipment rack, and work shelf. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in an indoor archery equipment alcove facing the masonry wall, leather-equipment rack, gray cabinet, and polished floor. The view stays still except for mild handheld sway. Floor reflections drift slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical arrow quiver from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the arrow quiver. The action is explicit and continuous: the same hands naturally bring the same arrow quiver back into clear view. Preserve the arrow quiver's exact instance identity, body and pocket geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a red-brown leather hip quiver with three cream-stitched pockets, a broad black belt loop, and three blue-fletched practice arrows", "target_aliases": ["arrow quiver"], "references": [{"timestamp_seconds": 22.187, "frame_index": 532, "bbox_xyxy_normalized": [0.2704326923076923, 0.0020833333333333333, 0.6814903846153846, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_017_reappear_01", "scene": "Swimming Pool", "video": "videos/synthetic/syn_017.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a lifeguard chair facing an indoor pool, lane ropes, numbered starting blocks, and a tiled deck. An equipment rack stands along the right wall. The view stays still except for mild handheld sway. Pool reflections and lane ropes move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view from a lifeguard chair facing the indoor pool, starting blocks, tiled deck, and right-wall equipment rack. The view stays still except for mild handheld sway. Pool reflections continue."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the pool-lane view until a rescue board leaning against the tiled wall fills the near view. After holding that view, the viewpoint turns back to the opening pool-lane view."}, {"clip_id": "04", "clip_prompt": "A hand brings a stopwatch into clear view in the foreground, holds it, then takes the stopwatch out of view. The view stays on the pool lanes and starting blocks."}, {"clip_id": "05", "clip_prompt": "A first-person view from a lifeguard chair facing the indoor pool, starting blocks, tiled deck, and equipment rack. The view stays still except for mild handheld sway. Pool reflections and lane ropes continue."}, {"clip_id": "06", "clip_prompt": "A first-person view from a lifeguard chair facing the indoor pool, starting blocks, and tiled deck. The view stays still except for mild handheld sway. Pool reflections move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical stopwatch from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the stopwatch. The action is explicit and continuous: the same hand naturally brings the same stopwatch back into clear view. Preserve the stopwatch's exact instance identity, case geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a green waterproof stopwatch with a white outer rim, two raised black side buttons, a clear scratched lens, and a red lanyard loop", "target_aliases": ["stopwatch"], "references": [{"timestamp_seconds": 34.68, "frame_index": 832, "bbox_xyxy_normalized": [0.41466346153846156, 0.29791666666666666, 0.6370192307692307, 0.8]}]}
+{"type": "synthetic", "task_id": "syn_017_revisit_01", "scene": "Swimming Pool", "video": "videos/synthetic/syn_017.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a lifeguard chair facing an indoor pool, lane ropes, numbered starting blocks, and a tiled deck. An equipment rack stands along the right wall. The view stays still except for mild handheld sway. Pool reflections and lane ropes move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view from a lifeguard chair facing the indoor pool, starting blocks, tiled deck, and right-wall equipment rack. The view stays still except for mild handheld sway. Pool reflections continue."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the pool-lane view until a rescue board leaning against the tiled wall fills the near view. After holding that view, the viewpoint turns back to the opening pool-lane view."}, {"clip_id": "04", "clip_prompt": "A hand brings a stopwatch into clear view in the foreground, holds it, then takes the stopwatch out of view. The view stays on the pool lanes and starting blocks."}, {"clip_id": "05", "clip_prompt": "A first-person view from a lifeguard chair facing the indoor pool, starting blocks, tiled deck, and equipment rack. The view stays still except for mild handheld sway. Pool reflections and lane ropes continue."}, {"clip_id": "06", "clip_prompt": "A first-person view from a lifeguard chair facing the indoor pool, starting blocks, and tiled deck. The view stays still except for mild handheld sway. Pool reflections move slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed rescue board fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the rescue board, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a red rescue board with a broad yellow cross, six black hand openings, and a gray scuffed edge band", "target_aliases": ["rescue board"], "references": [{"timestamp_seconds": 25.229, "frame_index": 605, "bbox_xyxy_normalized": [0.453125, 0.0125, 0.703125, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_018_reappear_01", "scene": "Bakery", "video": "videos/synthetic/syn_018.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a bakery proofing room facing a stainless table, tall proofing racks with trays, a steamed window, and a closed service door. Coats hang from wall pegs beside the door. The view stays still except for mild handheld sway. Steam and stainless highlights move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view in a bakery proofing room facing the stainless table, proofing racks, window, and closed door. The view stays still except for mild handheld sway. Steam and reflections continue."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns left from the table-and-rack view until a stand mixer on the stainless counter fills the near view. After holding that view, the viewpoint turns back to the opening table-and-rack view."}, {"clip_id": "04", "clip_prompt": "A hand brings an oven mitt into clear view, holds it so the sunflower face is visible, then takes the oven mitt out of view. The view stays on the steel table and proofing racks."}, {"clip_id": "05", "clip_prompt": "A first-person view in a bakery proofing room facing the stainless table, proofing racks, window, and closed door. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a bakery proofing room facing the stainless table, proofing racks, and steamed window. The view stays still except for mild handheld sway. Steam and stainless highlights move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical oven mitt from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the oven mitt. The action is explicit and continuous: the same hand naturally brings the same oven mitt back into clear view. Preserve the oven mitt's exact instance identity, mitt geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a deep blue quilted oven mitt with a large yellow sunflower patch, a red striped wrist cuff, a cream hanging loop, and a darkened thumb seam", "target_aliases": ["oven mitt"], "references": [{"timestamp_seconds": 35.926, "frame_index": 862, "bbox_xyxy_normalized": [0.12379807692307693, 0.025, 0.9182692307692307, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_018_revisit_01", "scene": "Bakery", "video": "videos/synthetic/syn_018.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a bakery proofing room facing a stainless table, tall proofing racks with trays, a steamed window, and a closed service door. Coats hang from wall pegs beside the door. The view stays still except for mild handheld sway. Steam and stainless highlights move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view in a bakery proofing room facing the stainless table, proofing racks, window, and closed door. The view stays still except for mild handheld sway. Steam and reflections continue."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns left from the table-and-rack view until a stand mixer on the stainless counter fills the near view. After holding that view, the viewpoint turns back to the opening table-and-rack view."}, {"clip_id": "04", "clip_prompt": "A hand brings an oven mitt into clear view, holds it so the sunflower face is visible, then takes the oven mitt out of view. The view stays on the steel table and proofing racks."}, {"clip_id": "05", "clip_prompt": "A first-person view in a bakery proofing room facing the stainless table, proofing racks, window, and closed door. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a bakery proofing room facing the stainless table, proofing racks, and steamed window. The view stays still except for mild handheld sway. Steam and stainless highlights move slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed stand mixer fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the stand mixer, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a green stand mixer with a brushed steel bowl, an orange circular speed badge, flour dust around the base, and a cream cloth covering its cord", "target_aliases": ["stand mixer"], "references": [{"timestamp_seconds": 24.6, "frame_index": 590, "bbox_xyxy_normalized": [0.20192307692307693, 0.15208333333333332, 0.6610576923076923, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_019_reappear_01", "scene": "Laundry", "video": "videos/synthetic/syn_019.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a commercial laundry facing a stainless inspection cart, three washer fronts, a floor drain, and a side doorway with a wall rail. The view stays still except for mild handheld sway. Stainless reflections move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view in a commercial laundry facing the stainless inspection cart, three washer fronts, and floor drain. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "A first-person view in a commercial laundry facing the stainless inspection cart, three washer fronts, floor drain, and side doorway. The view stays still except for mild handheld sway. Stainless reflections continue."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the washer-and-cart view until a laundry hamper stands in the revealed rear space. After holding that view, the viewpoint turns back to the opening washer view."}, {"clip_id": "05", "clip_prompt": "Hands bring a fabric brush into clear view over the stainless cart, hold the bristles and wooden grip, then take the fabric brush out of view. The view stays on the washers."}, {"clip_id": "06", "clip_prompt": "A first-person view in a commercial laundry facing the stainless inspection cart, three washer fronts, and floor drain. The view stays still except for mild handheld sway. Stainless reflections move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical fabric brush from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the fabric brush. The action is explicit and continuous: the same hands naturally bring the same fabric brush back into clear view. Preserve the fabric brush's exact instance identity, brush-body and bristle geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a dark-green molded-rubber fabric brush with a short walnut grip insert, a dense row of cream stiff bristles, and lint caught near one end", "target_aliases": ["fabric brush"], "references": [{"timestamp_seconds": 42.012, "frame_index": 1008, "bbox_xyxy_normalized": [0.3233173076923077, 0.32708333333333334, 0.7512019230769231, 0.7020833333333333]}]}
+{"type": "synthetic", "task_id": "syn_019_revisit_01", "scene": "Laundry", "video": "videos/synthetic/syn_019.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a commercial laundry facing a stainless inspection cart, three washer fronts, a floor drain, and a side doorway with a wall rail. The view stays still except for mild handheld sway. Stainless reflections move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view in a commercial laundry facing the stainless inspection cart, three washer fronts, and floor drain. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "A first-person view in a commercial laundry facing the stainless inspection cart, three washer fronts, floor drain, and side doorway. The view stays still except for mild handheld sway. Stainless reflections continue."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the washer-and-cart view until a laundry hamper stands in the revealed rear space. After holding that view, the viewpoint turns back to the opening washer view."}, {"clip_id": "05", "clip_prompt": "Hands bring a fabric brush into clear view over the stainless cart, hold the bristles and wooden grip, then take the fabric brush out of view. The view stays on the washers."}, {"clip_id": "06", "clip_prompt": "A first-person view in a commercial laundry facing the stainless inspection cart, three washer fronts, and floor drain. The view stays still except for mild handheld sway. Stainless reflections move slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed laundry hamper fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the laundry hamper, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a tall orange-canvas rolling linen hamper with a deep blue sewn side pocket, a cream route tag tied to its dented steel upper rail, and four black swivel casters", "target_aliases": ["rolling linen hamper"], "references": [{"timestamp_seconds": 35.015, "frame_index": 840, "bbox_xyxy_normalized": [0.23677884615384615, 0.10625, 0.8293269230769231, 0.9145833333333333]}]}
+{"type": "synthetic", "task_id": "syn_020_reappear_01", "scene": "Veterinary Clinic", "video": "videos/synthetic/syn_020.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a veterinary imaging room facing an examination table, wooden cabinets, a monitor, and a window. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right and angles downward until a floor-mounted veterinary animal scale fills the near view beside the examination table. After holding that view, the viewpoint returns to the opening room view."}, {"clip_id": "03", "clip_prompt": "Hands bring a rigid rectangular stethoscope case into the foreground and open it, showing the coiled stethoscope inside, then take the stethoscope case out of view. The view stays in the veterinary imaging room."}, {"clip_id": "04", "clip_prompt": "A first-person view in a veterinary imaging room facing an examination table, cabinets, a monitor, and a window. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "A first-person view in a veterinary imaging room facing an examination table, cabinets, a monitor, and a window. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a veterinary imaging room facing an examination table, cabinets, a monitor, and a window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. The same hands bring the exact same physical stethoscope case seen earlier back into the foreground and open it. Inside the open case, the same coiled stethoscope is clearly recognizable as one complete instrument with its paired earpieces and round chestpiece visible. Treat the preceding video as the complete and authoritative visual reference for the case and stethoscope. Match their exact instance identity and visible appearance from the preceding context. Maintain the established room, spatial layout, lighting, perspective, viewpoint behavior, and visual style, with natural and temporally smooth motion.", "task_type": "reappear", "target_label": "a red stethoscope case with a white paw mark, a charcoal zipper, a cream felt lining, and a small brass name plate", "target_aliases": ["stethoscope case"], "references": [{"timestamp_seconds": 23.689, "frame_index": 569, "bbox_xyxy_normalized": [0.12139423076923077, 0.08333333333333333, 0.9411057692307693, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_020_revisit_01", "scene": "Veterinary Clinic", "video": "videos/synthetic/syn_020.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a veterinary imaging room facing an examination table, wooden cabinets, a monitor, and a window. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right and angles downward until a floor-mounted veterinary animal scale fills the near view beside the examination table. After holding that view, the viewpoint returns to the opening room view."}, {"clip_id": "03", "clip_prompt": "Hands bring a rigid rectangular stethoscope case into the foreground and open it, showing the coiled stethoscope inside, then take the stethoscope case out of view. The view stays in the veterinary imaging room."}, {"clip_id": "04", "clip_prompt": "A first-person view in a veterinary imaging room facing an examination table, cabinets, a monitor, and a window. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "A first-person view in a veterinary imaging room facing an examination table, cabinets, a monitor, and a window. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a veterinary imaging room facing an examination table, cabinets, a monitor, and a window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right and angles downward until the previously observed animal scale fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the animal scale, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a floor-mounted veterinary animal scale with a low square black weighing platform, white border, four beige paw-print markers, and an upright gray readout column", "target_aliases": ["floor-mounted veterinary animal scale", "animal scale"], "references": [{"timestamp_seconds": 15.399, "frame_index": 370, "bbox_xyxy_normalized": [0.33052884615384615, 0.3375, 0.6850961538461539, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_021_reappear_01", "scene": "Irrigation Gate", "video": "videos/synthetic/syn_021.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view on an irrigation-gate deck facing a concrete canal, a timber sluice gate, a water-level ruler, and a wooden bench on the right. Reeds stand along both banks. The view stays still except for mild handheld sway. Water and reeds move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view on an irrigation-gate deck facing the canal, timber sluice gate, water-level ruler, and right-side bench. The view stays still except for mild handheld sway. Water reflections continue."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the canal-and-gate view until a control box on the deck railing fills the near view, showing its blue handwheel. After holding that view, the viewpoint turns back to the opening canal view."}, {"clip_id": "04", "clip_prompt": "A hand lifts a wooden mallet from the bench into clear view, holds it over the slats, then lowers the wooden mallet back toward the bench. The view stays on the irrigation-gate deck."}, {"clip_id": "05", "clip_prompt": "A first-person view on an irrigation-gate deck facing the canal, timber sluice gate, water-level ruler, and right-side bench. The view stays still except for mild handheld sway. Water and reeds continue."}, {"clip_id": "06", "clip_prompt": "A first-person view on an irrigation-gate deck facing the canal, timber sluice gate, and right-side bench. The view stays still except for mild handheld sway. Water and reeds move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical wooden mallet from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the wooden mallet. The action is explicit and continuous: the same hand naturally brings the same wooden mallet back into clear view. Preserve the wooden mallet's exact instance identity, head and handle geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a red wooden maintenance mallet with three cream grip bands, a dark iron head, and water-darkened ash grain near the handle end", "target_aliases": ["wooden mallet"], "references": [{"timestamp_seconds": 33.505, "frame_index": 804, "bbox_xyxy_normalized": [0.5288461538461539, 0.22708333333333333, 0.7668269230769231, 0.86875]}]}
+{"type": "synthetic", "task_id": "syn_022_reappear_01", "scene": "Boxing Gym", "video": "videos/synthetic/syn_022.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view in an orbital boxing gym facing a red punching bag, blue training frames, hanging towels, and a circular window showing Earth. The view stays still except for mild handheld sway. The punching bag and the Earth view move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person seated view in an orbital boxing gym. A red punching bag swings slowly in the midground. Towels, blue training frames, and an Earth window stay in place. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns around toward the rear until a championship boxing belt mounted horizontally on the rear bulkhead fills the view. After holding that view, the viewpoint turns back to the opening gym view."}, {"clip_id": "04", "clip_prompt": "Hands bring a structured boxing glove with its broad laced cuff into clear view from a mesh gear pocket, handle it, then return the boxing glove toward the mesh bag. The view stays in the orbital boxing gym."}, {"clip_id": "05", "clip_prompt": "A first-person seated view in an orbital boxing gym. A red punching bag swings slowly beside an Earth window. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person seated view in an orbital boxing gym facing a punching bag, blue frames, towels, and an Earth window. The punching bag swings slightly. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical structured boxing glove with its broad laced cuff from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the boxing glove. The action is explicit and continuous: the same hand naturally brings the same structured boxing glove from the mesh gear pocket back into clear view. Preserve the boxing glove's exact instance identity, padded glove and cuff geometry, dimensions, proportions, thumb attachment, lacing, seam and patch layout, materials, texture, wear, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "one cobalt-blue leather boxing glove with a mustard-yellow quilted wrist cuff, a large white stitched star patch, worn cream laces, and natural creases across the knuckles", "target_aliases": ["boxing glove"], "references": [{"timestamp_seconds": 37.93, "frame_index": 910, "bbox_xyxy_normalized": [0.41466346153846156, 0.32708333333333334, 0.6550480769230769, 0.85]}]}
+{"type": "synthetic", "task_id": "syn_023_reappear_01", "scene": "Fire Station", "video": "videos/synthetic/syn_023.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a lunar fire-station bay facing a circular hatch, a yellow-and-black floor stripe, yellow-strapped lockers on the left, and wall panels on the right. A suited figure stands on the right. The view stays still except for mild handheld sway. Overhead lights and hanging straps stay in place."}, {"clip_id": "02", "clip_prompt": "A first-person view in a fire-station bay facing the circular hatch, floor stripe, left-wall lockers, and the suited figure on the right. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "A first-person view in a fire-station bay facing the circular hatch, yellow-strapped lockers, and the suited figure on the right. The view stays still except for mild handheld sway. Overhead lights stay even."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right around from the hatch-aisle view until a hose reel on the opposite hatch fills the near view. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "05", "clip_prompt": "Gloved hands bring an inspection flashlight into clear view, hold it in the foreground, then take the inspection flashlight out of view. The view stays on the hatch aisle. The suited figure remains on the right."}, {"clip_id": "06", "clip_prompt": "A first-person view in a fire-station bay facing the circular hatch, floor stripe, left-wall lockers, and the suited figure on the right. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical inspection flashlight from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the inspection flashlight. The action is explicit and continuous: the same gloved hands naturally bring the same inspection flashlight back into clear view. Preserve the inspection flashlight's exact instance identity, barrel and head geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and gloved-hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a blue inspection flashlight with two broad cream rings, a textured black grip, a red charging indicator, and a clear lens with fine dust specks", "target_aliases": ["inspection flashlight"], "references": [{"timestamp_seconds": 43.179, "frame_index": 1036, "bbox_xyxy_normalized": [0.43149038461538464, 0.50625, 0.6887019230769231, 0.95625]}]}
+{"type": "synthetic", "task_id": "syn_023_revisit_01", "scene": "Fire Station", "video": "videos/synthetic/syn_023.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a lunar fire-station bay facing a circular hatch, a yellow-and-black floor stripe, yellow-strapped lockers on the left, and wall panels on the right. A suited figure stands on the right. The view stays still except for mild handheld sway. Overhead lights and hanging straps stay in place."}, {"clip_id": "02", "clip_prompt": "A first-person view in a fire-station bay facing the circular hatch, floor stripe, left-wall lockers, and the suited figure on the right. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "A first-person view in a fire-station bay facing the circular hatch, yellow-strapped lockers, and the suited figure on the right. The view stays still except for mild handheld sway. Overhead lights stay even."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right around from the hatch-aisle view until a hose reel on the opposite hatch fills the near view. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "05", "clip_prompt": "Gloved hands bring an inspection flashlight into clear view, hold it in the foreground, then take the inspection flashlight out of view. The view stays on the hatch aisle. The suited figure remains on the right."}, {"clip_id": "06", "clip_prompt": "A first-person view in a fire-station bay facing the circular hatch, floor stripe, left-wall lockers, and the suited figure on the right. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed hose reel fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the hose reel, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a large orange fire-hose reel with a white cross center plate, a cobalt-blue hub, a coiled cream hose, and two silver wall-mount brackets", "target_aliases": ["fire-hose reel"], "references": [{"timestamp_seconds": 34.882, "frame_index": 837, "bbox_xyxy_normalized": [0.26322115384615385, 0.35833333333333334, 0.5540865384615384, 0.925]}]}
+{"type": "synthetic", "task_id": "syn_024_reappear_01", "scene": "Planetarium", "video": "videos/synthetic/syn_024.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person over-the-shoulder view of a seated operator in a white shirt at a dark planetarium console with three blue monitors and a circular star window. Switch panels line both walls. The view stays still except for mild handheld sway. The operator's hands rest on the console and make a small adjustment."}, {"clip_id": "02", "clip_prompt": "First-person hands bring a closed book into the foreground, open it to diagram pages, then close the book and take it out of view. The seated operator remains at the three-monitor console in front of the circular window. The view stays on the control chamber."}, {"clip_id": "03", "clip_prompt": "A first-person over-the-shoulder view of a seated operator at the three-monitor console and circular star window. Switch panels stay on both sides. The view stays still except for mild handheld sway. The operator's hands make small console adjustments."}, {"clip_id": "04", "clip_prompt": "A first-person over-the-shoulder view of a seated operator at the console, three blue monitors, and circular star window. The view stays still except for mild handheld sway. Indicator lights remain on the side panels."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns right around from the operator-and-console view until a square button panel stands centered on its post in front of the circular window. After holding that view, the viewpoint turns back to the opening operator view."}, {"clip_id": "06", "clip_prompt": "A first-person over-the-shoulder view of a seated operator at the console, three blue monitors, and circular star window. The view stays still except for mild handheld sway. The operator remains seated at the workstation."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical book from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the book. The action is explicit and continuous: the same first-person hands naturally bring the book into the foreground and open it. Preserve the book's exact instance identity, book geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and two-handed grip. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a green star atlas with a yellow comet on its cover, a navy elastic closure, silver page corners, and a faint crease through the spine", "target_aliases": ["star atlas"], "references": [{"timestamp_seconds": 11.166, "frame_index": 268, "bbox_xyxy_normalized": [0.2932692307692308, 0.35208333333333336, 0.7620192307692307, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_025_reappear_01", "scene": "Post Office", "video": "videos/synthetic/syn_025.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view down a postal sorting aisle, with numbered grey cubbies on the right, an Earth window and green workbench on the left, and a circular hatch at the far end. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right around from the aisle view until a mail cart stands centered in the rear bay. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "03", "clip_prompt": "A first-person hand lifts a scanner into view, presses a button so a red scan line fires across the aisle, then lowers the scanner out of view. A coiled cable stays connected. The view stays on the sorting aisle."}, {"clip_id": "04", "clip_prompt": "A first-person view down a postal sorting aisle, cubbies on the right, Earth window and green workbench on the left, hatch at the far end. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "A first-person view down a postal sorting aisle toward the far hatch, cubbies on the right and Earth window on the left. The view stays still except for mild handheld sway. The viewpoint later eases slightly toward the cubby wall."}, {"clip_id": "06", "clip_prompt": "A first-person view down a postal sorting aisle toward the far hatch, cubbies on the right and Earth window on the left. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical scanner from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the scanner. The action is explicit and continuous: the same first-person hand naturally lifts the scanner into view. Preserve the scanner's exact instance identity, handheld scanner geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and one-handed grip. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a cream handheld parcel barcode scanner with a thick orange rubber bumper, a cobalt-blue coiled cable, one dark-red glass scan window, three black thumb buttons, and natural gray wear around the grip", "target_aliases": ["parcel barcode scanner"], "references": [{"timestamp_seconds": 26.152, "frame_index": 628, "bbox_xyxy_normalized": [0.3004807692307692, 0.3458333333333333, 0.5745192307692307, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_026_reappear_01", "scene": "Mars Outpost", "video": "videos/synthetic/syn_026.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a raised metal platform over a dusty Martian plain. An orange strapped crate sits on the left, a long boom extends forward, and a white habitat with a lattice antenna stands on the right. The view stays still except for mild handheld sway. Dust moves in the distance."}, {"clip_id": "02", "clip_prompt": "A first-person view from a platform facing the crate, boom, habitat, and antenna under the orange sky. The view stays still except for mild handheld sway. Dust continues to drift."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the antenna-and-crate view until a spacesuit stands centered in its docking frame on the platform. After holding that view, the viewpoint turns back to the opening outpost view."}, {"clip_id": "04", "clip_prompt": "A gloved technician lifts a tablet into the foreground, checks its screen, then lowers the tablet out of view. The view stays on the antenna outpost."}, {"clip_id": "05", "clip_prompt": "A first-person view from a platform facing the crate, boom, habitat, and antenna. The view stays still except for mild handheld sway. Dust drifts across the plain."}, {"clip_id": "06", "clip_prompt": "A first-person view from a platform over the Martian plain. The antenna dish turns slowly and a dust swirl moves across the ground. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical tablet from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the tablet. The action is explicit and continuous: the same gloved technician naturally lifts the tablet into the foreground. Preserve the tablet's exact instance identity, tablet geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and two-handed gloved grip. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a blue diagnostic tablet with an orange ring on its back, a black dust hood, a silver connector flap, and fine red dust along its lower edge", "target_aliases": ["diagnostic tablet"], "references": [{"timestamp_seconds": 33.971, "frame_index": 815, "bbox_xyxy_normalized": [0.2403846153846154, 0.0, 0.7524038461538461, 0.9479166666666666]}]}
+{"type": "synthetic", "task_id": "syn_026_revisit_01", "scene": "Mars Outpost", "video": "videos/synthetic/syn_026.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view from a raised metal platform over a dusty Martian plain. An orange strapped crate sits on the left, a long boom extends forward, and a white habitat with a lattice antenna stands on the right. The view stays still except for mild handheld sway. Dust moves in the distance."}, {"clip_id": "02", "clip_prompt": "A first-person view from a platform facing the crate, boom, habitat, and antenna under the orange sky. The view stays still except for mild handheld sway. Dust continues to drift."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the antenna-and-crate view until a spacesuit stands centered in its docking frame on the platform. After holding that view, the viewpoint turns back to the opening outpost view."}, {"clip_id": "04", "clip_prompt": "A gloved technician lifts a tablet into the foreground, checks its screen, then lowers the tablet out of view. The view stays on the antenna outpost."}, {"clip_id": "05", "clip_prompt": "A first-person view from a platform facing the crate, boom, habitat, and antenna. The view stays still except for mild handheld sway. Dust drifts across the plain."}, {"clip_id": "06", "clip_prompt": "A first-person view from a platform over the Martian plain. The antenna dish turns slowly and a dust swirl moves across the ground. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed spacesuit fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the spacesuit, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a white Mars exploration suit with a green square chest panel, a red dust seal around the helmet ring, silver joint bands, and a dark tether clipped at the waist", "target_aliases": ["Mars exploration suit"], "references": [{"timestamp_seconds": 26.762, "frame_index": 642, "bbox_xyxy_normalized": [0.32572115384615385, 0.025, 0.6322115384615384, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_027_reappear_01", "scene": "Cargo Bay", "video": "videos/synthetic/syn_027.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view down a white orbital cargo module toward a circular far hatch. A window on the left shows Earth, and racks with yellow straps sit on the right. The view stays still except for mild handheld sway. The Earth view and window glare change slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view down a module aisle toward the far hatch, Earth window on the left, dark racks and orange straps on the right. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "A first-person view down a module aisle toward the far hatch, Earth window on the left, dark racks and orange straps on the right. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the aisle view until a padded seat sits centered in the module bay. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "05", "clip_prompt": "A two transfer arms bring a round canister into the central aisle, hold it, then take the round canister out of the near view. The view stays on the module corridor."}, {"clip_id": "06", "clip_prompt": "A first-person view down an empty module aisle toward the far hatch, Earth window on the left, racks and straps on the right. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical round canister from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the round canister. The action is explicit and continuous: the same two transfer arms naturally bring the round canister into the central aisle. Preserve the round canister's exact instance identity, canister geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and two-armed mechanical grip. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a large safety-red spherical specimen canister whose red painted shell covers nearly the whole sphere, with two broad recessed white latitude grooves, one circular silver specimen window, and a cobalt-blue locking tab", "target_aliases": ["spherical specimen canister"], "references": [{"timestamp_seconds": 44.287, "frame_index": 1063, "bbox_xyxy_normalized": [0.2283653846153846, 0.4270833333333333, 0.8353365384615384, 0.9854166666666667]}]}
+{"type": "synthetic", "task_id": "syn_027_revisit_01", "scene": "Cargo Bay", "video": "videos/synthetic/syn_027.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view down a white orbital cargo module toward a circular far hatch. A window on the left shows Earth, and racks with yellow straps sit on the right. The view stays still except for mild handheld sway. The Earth view and window glare change slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view down a module aisle toward the far hatch, Earth window on the left, dark racks and orange straps on the right. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "A first-person view down a module aisle toward the far hatch, Earth window on the left, dark racks and orange straps on the right. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the aisle view until a padded seat sits centered in the module bay. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "05", "clip_prompt": "A two transfer arms bring a round canister into the central aisle, hold it, then take the round canister out of the near view. The view stays on the module corridor."}, {"clip_id": "06", "clip_prompt": "A first-person view down an empty module aisle toward the far hatch, Earth window on the left, racks and straps on the right. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed padded seat fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the padded seat, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a large orange orbital rescue chair with a white five-point safety harness, a cobalt-blue padded headrest, one green oxygen cylinder, and two silver wall-rail clamps", "target_aliases": ["orbital rescue chair"], "references": [{"timestamp_seconds": 35.254, "frame_index": 846, "bbox_xyxy_normalized": [0.44711538461538464, 0.24375, 0.6021634615384616, 0.8125]}]}
+{"type": "synthetic", "task_id": "syn_028_reappear_01", "scene": "Forest Shrine", "video": "videos/synthetic/syn_028.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view at a mossy stone altar in a moonlit forest. Incense, fruit plates, and a lit candle sit on the altar. Hands rest in the lap. The view stays still except for mild handheld sway. The candle flame and fireflies move slightly."}, {"clip_id": "02", "clip_prompt": "A caretaker lifts a thermos from the tan shoulder bag, pours into a stone cup, then returns the thermos to the bag. The view stays on the mossy altar and forest path."}, {"clip_id": "03", "clip_prompt": "A first-person seated view at a mossy stone altar. Incense, fruit plates, and the lit candle remain on the altar. The view stays still except for mild handheld sway. The candle flame and mist continue."}, {"clip_id": "04", "clip_prompt": "A first-person seated view at a mossy stone altar facing the incense, fruit plates, and forest path. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns right from the altar view until a square lantern hangs centered among the trees. After holding that view, the viewpoint turns back to the opening altar view."}, {"clip_id": "06", "clip_prompt": "A first-person seated view at a mossy stone altar facing the incense, fruit plates, and forest path. Hands rest at the lap. The view stays still except for mild handheld sway. The candle flame and fireflies move slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical thermos from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the thermos. The action is explicit and continuous: the same caretaker naturally lifts the thermos from the shoulder bag and pours into the stone cup. Preserve the thermos's exact instance identity, flask geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a short brick-red enamel vacuum flask with one large cream ginkgo-leaf motif, a dark cork stopper, a curved brass side handle, and a narrow black base ring", "target_aliases": ["vacuum flask"], "references": [{"timestamp_seconds": 11.633, "frame_index": 279, "bbox_xyxy_normalized": [0.41346153846153844, 0.09166666666666666, 0.6598557692307693, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_028_revisit_01", "scene": "Forest Shrine", "video": "videos/synthetic/syn_028.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view at a mossy stone altar in a moonlit forest. Incense, fruit plates, and a lit candle sit on the altar. Hands rest in the lap. The view stays still except for mild handheld sway. The candle flame and fireflies move slightly."}, {"clip_id": "02", "clip_prompt": "A caretaker lifts a thermos from the tan shoulder bag, pours into a stone cup, then returns the thermos to the bag. The view stays on the mossy altar and forest path."}, {"clip_id": "03", "clip_prompt": "A first-person seated view at a mossy stone altar. Incense, fruit plates, and the lit candle remain on the altar. The view stays still except for mild handheld sway. The candle flame and mist continue."}, {"clip_id": "04", "clip_prompt": "A first-person seated view at a mossy stone altar facing the incense, fruit plates, and forest path. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns right from the altar view until a square lantern hangs centered among the trees. After holding that view, the viewpoint turns back to the opening altar view."}, {"clip_id": "06", "clip_prompt": "A first-person seated view at a mossy stone altar facing the incense, fruit plates, and forest path. Hands rest at the lap. The view stays still except for mild handheld sway. The candle flame and fireflies move slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed square lantern fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the square lantern, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a floating blue square lantern with a warm-orange star-shaped aperture, a frosted glass body, a thin brass suspension ring, and a soft halo in the mist", "target_aliases": ["square lantern"], "references": [{"timestamp_seconds": 43.006, "frame_index": 1032, "bbox_xyxy_normalized": [0.45072115384615385, 0.03958333333333333, 0.6622596153846154, 0.6958333333333333]}]}
+{"type": "synthetic", "task_id": "syn_029_reappear_01", "scene": "Pottery Studio", "video": "videos/synthetic/syn_029.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a pottery kiln studio facing a tan top-loading kiln and a black front-loading kiln under a high window. Wooden shelves packed with unglazed pots stand on the left. Two hanging aprons and a tall metal drying rack stay in view. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns left from the kiln view until a pottery wheel is centered, showing its black metal stand, white splash pan, gray wheel head, black foot pedal, and yellow caution sticker. After holding that view, the viewpoint turns back to the opening kiln view."}, {"clip_id": "03", "clip_prompt": "A first-person view in a pottery kiln studio facing the two kilns, the clay shelves, the hanging aprons, and the metal drying rack under the high window. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "A potter carries a teapot on a long ware board with both hands toward the kilns. The squat tan-gray teapot has a curved spout and a loop handle. The potter then places a matching lid on the teapot and keeps holding the board."}, {"clip_id": "05", "clip_prompt": "A first-person view in a pottery kiln studio facing the two kilns, the clay shelves, the hanging aprons, and the metal drying rack. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a pottery kiln studio facing the tan top-loading kiln, the black kiln, the clay shelves, the hanging aprons, and the metal drying rack under the high window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical teapot from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the teapot. The action is explicit and continuous: the same potter naturally carries the same teapot on its ware board back into clear view toward the kiln area. Preserve the teapot's exact instance identity, body and spout geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and ware-board contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "the same squat gray-beige stoneware teapot with a large round loop handle, a fitted disk lid with a square knob, and a dark brown interior", "target_aliases": ["stoneware teapot"], "references": [{"timestamp_seconds": 33.696, "frame_index": 809, "bbox_xyxy_normalized": [0.3870192307692308, 0.5104166666666666, 0.7283653846153846, 0.88125]}]}
+{"type": "synthetic", "task_id": "syn_030_reappear_01", "scene": "Tailoring Shop", "video": "videos/synthetic/syn_030.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a tailoring room facing a long white cutting table, a window, a many-drawer thread cabinet, and a garment rack. A beige curtain hangs on the right. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A first-person view in a tailoring room facing the white cutting table, the window, the thread-drawer cabinet, and the garment rack. The beige curtain remains on the right. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the cutting-table view until a sewing machine is centered, showing its black head with gold decals, wooden table, cast-iron treadle, and desk lamp beside folded-fabric shelves. After holding that view, the viewpoint turns back to the opening cutting-table view."}, {"clip_id": "04", "clip_prompt": "First-person hands lift a coat into the air, unfold it in the foreground, hold it open, then take the coat out of view. The coat is olive-green and quilted, with a rust collar, brass buttons, and a large cream oval sleeve patch."}, {"clip_id": "05", "clip_prompt": "A first-person view in a tailoring room facing the white cutting table, the window, the thread-drawer cabinet, and the garment rack. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a tailoring room facing the white cutting table, the window, the thread-drawer cabinet, and the garment rack. The beige curtain remains on the right. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical coat from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the coat. The action is explicit and continuous: the same first-person hands naturally lift and unfold the same coat into the air and into clear view. Preserve the coat's exact instance identity, coat geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a moss-green diamond-quilted vest or short coat with a broad rust-red corduroy collar, two round brass buttons, and one oversized cream oval patch across the lower front", "target_aliases": ["quilted coat"], "references": [{"timestamp_seconds": 34.476, "frame_index": 827, "bbox_xyxy_normalized": [0.0733173076923077, 0.004166666666666667, 0.9146634615384616, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_030_revisit_01", "scene": "Tailoring Shop", "video": "videos/synthetic/syn_030.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a tailoring room facing a long white cutting table, a window, a many-drawer thread cabinet, and a garment rack. A beige curtain hangs on the right. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A first-person view in a tailoring room facing the white cutting table, the window, the thread-drawer cabinet, and the garment rack. The beige curtain remains on the right. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the cutting-table view until a sewing machine is centered, showing its black head with gold decals, wooden table, cast-iron treadle, and desk lamp beside folded-fabric shelves. After holding that view, the viewpoint turns back to the opening cutting-table view."}, {"clip_id": "04", "clip_prompt": "First-person hands lift a coat into the air, unfold it in the foreground, hold it open, then take the coat out of view. The coat is olive-green and quilted, with a rust collar, brass buttons, and a large cream oval sleeve patch."}, {"clip_id": "05", "clip_prompt": "A first-person view in a tailoring room facing the white cutting table, the window, the thread-drawer cabinet, and the garment rack. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a tailoring room facing the white cutting table, the window, the thread-drawer cabinet, and the garment rack. The beige curtain remains on the right. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed sewing machine fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the sewing machine, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a black cast-iron treadle sewing machine with a gold floral decal, a pale timber tabletop, and a broad leather drive belt", "target_aliases": ["treadle sewing machine"], "references": [{"timestamp_seconds": 24.485, "frame_index": 588, "bbox_xyxy_normalized": [0.3581730769230769, 0.17916666666666667, 0.7043269230769231, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_031_reappear_01", "scene": "Organ Workshop", "video": "videos/synthetic/syn_031.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a pipe-organ workshop facing a long padded workbench down a central aisle. A dust curtain hangs on the left. Wooden organ structures stand on the right. High windows light the far end. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A first-person view in a pipe-organ workshop facing the padded workbench, the dust curtain on the left, and the wooden organ structures on the right. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns left from the aisle view until bellows are centered at the end of the long padded bench, showing a wooden frame around dark pleated tiered bellows. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "04", "clip_prompt": "Two restorers in dark shirts carry a large organ pipe horizontally from the dust curtain into the central aisle. The tapered dark-brown pipe has padded tan collars at both ends and a silver-gray wide end. They carry it across the aisle and out of view."}, {"clip_id": "05", "clip_prompt": "A first-person view in a pipe-organ workshop facing the padded workbench, the dust curtain, and the wooden organ structures. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a pipe-organ workshop facing the padded workbench down the aisle, the dust curtain on the left, and the wooden organ structures on the right. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical organ pipe from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the organ pipe. The action is explicit and continuous: the same two restorers naturally carry the same organ pipe horizontally from the dust curtain into the central aisle and into clear view. Preserve the organ pipe's exact instance identity, tapered-body geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and two-person carry contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "the same enormous tapered dark-brown organ pipe with a wide silver-gray collar and pale padded end caps, carried horizontally by the same two workers", "target_aliases": ["organ pipe"], "references": [{"timestamp_seconds": 33.981, "frame_index": 816, "bbox_xyxy_normalized": [0.16466346153846154, 0.46041666666666664, 0.9026442307692307, 0.8458333333333333]}]}
+{"type": "synthetic", "task_id": "syn_031_revisit_01", "scene": "Organ Workshop", "video": "videos/synthetic/syn_031.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a pipe-organ workshop facing a long padded workbench down a central aisle. A dust curtain hangs on the left. Wooden organ structures stand on the right. High windows light the far end. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A first-person view in a pipe-organ workshop facing the padded workbench, the dust curtain on the left, and the wooden organ structures on the right. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns left from the aisle view until bellows are centered at the end of the long padded bench, showing a wooden frame around dark pleated tiered bellows. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "04", "clip_prompt": "Two restorers in dark shirts carry a large organ pipe horizontally from the dust curtain into the central aisle. The tapered dark-brown pipe has padded tan collars at both ends and a silver-gray wide end. They carry it across the aisle and out of view."}, {"clip_id": "05", "clip_prompt": "A first-person view in a pipe-organ workshop facing the padded workbench, the dust curtain, and the wooden organ structures. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a pipe-organ workshop facing the padded workbench down the aisle, the dust curtain on the left, and the wooden organ structures on the right. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed bellows fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the bellows, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "the same broad black folded organ-bellows assembly held in a tall warm-brown timber frame, with closely spaced dark ribs and heavy wooden side posts", "target_aliases": ["organ bellows"], "references": [{"timestamp_seconds": 24.519, "frame_index": 588, "bbox_xyxy_normalized": [0.2824519230769231, 0.2520833333333333, 0.6550480769230769, 0.775]}]}
+{"type": "synthetic", "task_id": "syn_032_reappear_01", "scene": "Watch Workshop", "video": "videos/synthetic/syn_032.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view at a watchmaker bench facing a curved wooden bench, a sage-green mat, a magnifier lamp, small-part drawers, and a street window. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A first-person seated view at a watchmaker bench facing the curved wooden bench, the sage-green mat, the magnifier lamp, the small-part drawers, and the street window. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns left from the bench view until a wall clock is centered on the wall, showing a tall dark-wood case, a cream dial, and a pendulum behind glass. After holding that view, the viewpoint turns back to the opening bench view."}, {"clip_id": "04", "clip_prompt": "A first-person seated view at a watchmaker bench facing the curved wooden bench, the sage-green mat, the magnifier lamp, and the street window. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "The watchmaker opens a shallow green-felt drawer under the curved bench, revealing a pocket watch. The watchmaker lifts the round silver pocket watch with its white dial and crown loop, puts it back in the drawer, and closes the drawer."}, {"clip_id": "06", "clip_prompt": "A first-person seated view at a watchmaker bench facing the curved wooden bench, the sage-green mat, the magnifier lamp, the small-part drawers, and the street window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical pocket watch from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the pocket watch. The action is explicit and continuous: the same watchmaker naturally opens the shallow felt drawer and lifts the same pocket watch into clear view. Preserve the pocket watch's exact instance identity, round-case geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and drawer and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "the same round silver pocket watch with a bright white dial, dark hour markings, a small crown loop, and a polished metal rim, presented in the same shallow drawer tray", "target_aliases": ["pocket watch"], "references": [{"timestamp_seconds": 45.517, "frame_index": 1092, "bbox_xyxy_normalized": [0.47475961538461536, 0.66875, 0.5769230769230769, 0.9229166666666667]}]}
+{"type": "synthetic", "task_id": "syn_032_revisit_01", "scene": "Watch Workshop", "video": "videos/synthetic/syn_032.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view at a watchmaker bench facing a curved wooden bench, a sage-green mat, a magnifier lamp, small-part drawers, and a street window. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A first-person seated view at a watchmaker bench facing the curved wooden bench, the sage-green mat, the magnifier lamp, the small-part drawers, and the street window. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns left from the bench view until a wall clock is centered on the wall, showing a tall dark-wood case, a cream dial, and a pendulum behind glass. After holding that view, the viewpoint turns back to the opening bench view."}, {"clip_id": "04", "clip_prompt": "A first-person seated view at a watchmaker bench facing the curved wooden bench, the sage-green mat, the magnifier lamp, and the street window. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "The watchmaker opens a shallow green-felt drawer under the curved bench, revealing a pocket watch. The watchmaker lifts the round silver pocket watch with its white dial and crown loop, puts it back in the drawer, and closes the drawer."}, {"clip_id": "06", "clip_prompt": "A first-person seated view at a watchmaker bench facing the curved wooden bench, the sage-green mat, the magnifier lamp, the small-part drawers, and the street window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed wall clock fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the wall clock, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "the same tall dark-walnut wall clock with a round cream dial, black Roman-style markings, a glass-fronted lower case, and one round brass pendulum bob", "target_aliases": ["regulator clock"], "references": [{"timestamp_seconds": 25.042, "frame_index": 601, "bbox_xyxy_normalized": [0.32211538461538464, 0.00625, 0.5324519230769231, 0.925]}]}
+{"type": "synthetic", "task_id": "syn_033_reappear_01", "scene": "Shopping Arcade", "video": "videos/synthetic/syn_033.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "The view moves slowly forward down a covered arcade, facing stone paving, glass shopfronts, hanging lamps, arched ceiling, and a bright exit ahead. The view keeps moving forward."}, {"clip_id": "02", "clip_prompt": "The view keeps moving slowly forward down a covered arcade, facing the stone paving, shopfronts, hanging lamps, and distant exit. Side shops and lamps pass as the path advances."}, {"clip_id": "03", "clip_prompt": "A bakery courier rides a bicycle across the arcade in side profile and then leaves the view. The cream step-through bicycle has a wicker front basket with a teal cover and leather strap, plus a slatted rear crate. The courier wears a white shirt and a teal apron. The view keeps moving slowly forward."}, {"clip_id": "04", "clip_prompt": "The view keeps moving slowly forward down a covered arcade, facing the stone paving, shopfronts, hanging lamps, and distant exit. The path stays empty of a passing vehicle."}, {"clip_id": "05", "clip_prompt": "A cleaner pushes a cleaning cart from a left shop recess into the arcade path and then out of the near view. The cart has a translucent white tank of pale-blue liquid, a gray frame, bright-blue casters, a coiled red-orange hose, and brass squeegees. The view keeps moving slowly forward."}, {"clip_id": "06", "clip_prompt": "The view keeps moving slowly forward down a covered arcade, facing the stone paving, shopfronts, hanging lamps, and distant exit."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical bicycle from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the bicycle. The action is explicit and continuous: the same bakery courier naturally rides the same bicycle across the arcade from left to right and into clear view. Preserve the bicycle's exact instance identity, frame geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and rider contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a cream step-through bakery bicycle with a large woven front basket under a fitted teal cover, a large dark-brown slatted rear crate, and a courier wearing a matching teal apron", "target_aliases": ["delivery bicycle"], "references": [{"timestamp_seconds": 25.16, "frame_index": 604, "bbox_xyxy_normalized": [0.11538461538461539, 0.004166666666666667, 0.8966346153846154, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_033_reappear_02", "scene": "Shopping Arcade", "video": "videos/synthetic/syn_033.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "The view moves slowly forward down a covered arcade, facing stone paving, glass shopfronts, hanging lamps, arched ceiling, and a bright exit ahead. The view keeps moving forward."}, {"clip_id": "02", "clip_prompt": "The view keeps moving slowly forward down a covered arcade, facing the stone paving, shopfronts, hanging lamps, and distant exit. Side shops and lamps pass as the path advances."}, {"clip_id": "03", "clip_prompt": "A bakery courier rides a bicycle across the arcade in side profile and then leaves the view. The cream step-through bicycle has a wicker front basket with a teal cover and leather strap, plus a slatted rear crate. The courier wears a white shirt and a teal apron. The view keeps moving slowly forward."}, {"clip_id": "04", "clip_prompt": "The view keeps moving slowly forward down a covered arcade, facing the stone paving, shopfronts, hanging lamps, and distant exit. The path stays empty of a passing vehicle."}, {"clip_id": "05", "clip_prompt": "A cleaner pushes a cleaning cart from a left shop recess into the arcade path and then out of the near view. The cart has a translucent white tank of pale-blue liquid, a gray frame, bright-blue casters, a coiled red-orange hose, and brass squeegees. The view keeps moving slowly forward."}, {"clip_id": "06", "clip_prompt": "The view keeps moving slowly forward down a covered arcade, facing the stone paving, shopfronts, hanging lamps, and distant exit."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical cleaning cart from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the cleaning cart. The action is explicit and continuous: the same cleaner naturally rolls the same cleaning cart from the left shop recess into the established path and into clear view. Preserve the cleaning cart's exact instance identity, tank and frame geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and cleaner contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a compact white rectangular window-cleaning tank cart with a teal lower stripe, a large coiled coral-red hose, a brass tap and handle assembly, and four bright-blue rubber casters", "target_aliases": ["window-cleaning cart"], "references": [{"timestamp_seconds": 44.625, "frame_index": 1071, "bbox_xyxy_normalized": [0.40024038461538464, 0.1875, 0.7463942307692307, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_034_reappear_01", "scene": "Library", "video": "videos/synthetic/syn_034.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view at a pale wooden reading desk in a rainy neighborhood library. A warm frosted desk lamp and a green borrowing-card box sit on the desk. A narrow window shows rain and trees, with brown bookshelves to the right. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns left from the reading-desk view until a scarf is centered, draped over the back of a wooden chair in front of the bookshelves. After holding that view, the viewpoint turns back to the opening desk view."}, {"clip_id": "03", "clip_prompt": "A first-person seated view at a rainy-library reading desk. The frosted lamp, borrowing-card box, rainy window, and bookshelves remain in place. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "A first-person seated view at a rainy-library reading desk facing the lamp, borrowing-card box, rainy window, and bookshelves. The view stays still except for mild handheld sway. Rain and lamp light continue."}, {"clip_id": "05", "clip_prompt": "Hands lift a book from the canvas book bag into clear view, hold it so the closed green cover and yellow circle are visible, then lower the book out of view. The view stays on the reading desk and rainy window."}, {"clip_id": "06", "clip_prompt": "A first-person seated view at a rainy-library reading desk. The frosted lamp, borrowing-card box, rainy window, and bookshelves remain in place. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical book from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the book. The action is explicit and continuous: the same hands naturally lift the same book from the canvas book bag into clear view. Preserve the book's exact instance identity, closed-cover geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a closed green hardcover book with one large yellow circle", "target_aliases": ["book"], "references": [{"timestamp_seconds": 44.182, "frame_index": 1060, "bbox_xyxy_normalized": [0.14182692307692307, 0.0020833333333333333, 0.8617788461538461, 0.975]}]}
+{"type": "synthetic", "task_id": "syn_035_reappear_01", "scene": "Kitchen", "video": "videos/synthetic/syn_035.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a sunlit home kitchen facing a white counter, a bowl of green apples, sheer curtains, wooden cabinets, a copper kettle, and an open pantry doorway. The view stays still except for mild handheld sway. Sunlight and the curtains move slightly."}, {"clip_id": "02", "clip_prompt": "A hand holds a mug on the wooden drink tray in the foreground, then takes the mug out of the main view. The view stays in the sunlit kitchen facing the apple bowl, cabinets, and pantry doorway."}, {"clip_id": "03", "clip_prompt": "A first-person view in a sunlit home kitchen facing the apple bowl, sheer curtains, wooden cabinets, copper kettle, and pantry doorway. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "A household member walks in through the pantry doorway toward the foreground, carrying a grocery basket with both hands, then continues past and leaves the view to the right. The view stays on the kitchen counter and cabinets."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns right from the kitchen-counter view until an apron hangs centered on the white door. After holding that view, the viewpoint turns back to the opening kitchen view."}, {"clip_id": "06", "clip_prompt": "A first-person view in a sunlit home kitchen facing the apple bowl, wooden cabinets, copper kettle, and pantry doorway. The view stays still except for mild handheld sway. Sunlight and the curtains continue."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical mug from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the mug. The action is explicit and continuous: the same hand naturally holds the same mug on the wooden drink tray and brings it into clear view. Preserve the mug's exact instance identity, body and handle geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a blue enamel mug with one white flower", "target_aliases": ["mug"], "references": [{"timestamp_seconds": 13.771, "frame_index": 331, "bbox_xyxy_normalized": [0.27283653846153844, 0.26875, 0.7704326923076923, 0.9458333333333333]}]}
+{"type": "synthetic", "task_id": "syn_035_reappear_02", "scene": "Kitchen", "video": "videos/synthetic/syn_035.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a sunlit home kitchen facing a white counter, a bowl of green apples, sheer curtains, wooden cabinets, a copper kettle, and an open pantry doorway. The view stays still except for mild handheld sway. Sunlight and the curtains move slightly."}, {"clip_id": "02", "clip_prompt": "A hand holds a mug on the wooden drink tray in the foreground, then takes the mug out of the main view. The view stays in the sunlit kitchen facing the apple bowl, cabinets, and pantry doorway."}, {"clip_id": "03", "clip_prompt": "A first-person view in a sunlit home kitchen facing the apple bowl, sheer curtains, wooden cabinets, copper kettle, and pantry doorway. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "A household member walks in through the pantry doorway toward the foreground, carrying a grocery basket with both hands, then continues past and leaves the view to the right. The view stays on the kitchen counter and cabinets."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns right from the kitchen-counter view until an apron hangs centered on the white door. After holding that view, the viewpoint turns back to the opening kitchen view."}, {"clip_id": "06", "clip_prompt": "A first-person view in a sunlit home kitchen facing the apple bowl, wooden cabinets, copper kettle, and pantry doorway. The view stays still except for mild handheld sway. Sunlight and the curtains continue."}], "continue_prompt": "Continue the coherent first-person video from its final frame. The viewpoint stays in the same kitchen, facing the same counter, apple bowl, cabinets, and pantry doorway. The same household member walks in through the pantry doorway toward the foreground, carrying the exact same physical grocery basket seen earlier with both hands, then continues past and leaves the view. Treat the preceding video as the complete and authoritative visual reference for the household member and the grocery basket. Match their exact instance identity, the same basket structure, proportions and handles, and the same carrying posture, walking direction and path from the preceding context. Maintain the established scene, spatial layout, lighting, perspective, viewpoint behavior, and visual style, with natural and temporally smooth motion.", "task_type": "reappear", "target_label": "a red grocery basket with two cream handles", "target_aliases": ["grocery basket"], "references": [{"timestamp_seconds": 35.066, "frame_index": 842, "bbox_xyxy_normalized": [0.5024038461538461, 0.54375, 0.6790865384615384, 0.7895833333333333]}]}
+{"type": "synthetic", "task_id": "syn_035_revisit_01", "scene": "Kitchen", "video": "videos/synthetic/syn_035.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a sunlit home kitchen facing a white counter, a bowl of green apples, sheer curtains, wooden cabinets, a copper kettle, and an open pantry doorway. The view stays still except for mild handheld sway. Sunlight and the curtains move slightly."}, {"clip_id": "02", "clip_prompt": "A hand holds a mug on the wooden drink tray in the foreground, then takes the mug out of the main view. The view stays in the sunlit kitchen facing the apple bowl, cabinets, and pantry doorway."}, {"clip_id": "03", "clip_prompt": "A first-person view in a sunlit home kitchen facing the apple bowl, sheer curtains, wooden cabinets, copper kettle, and pantry doorway. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "A household member walks in through the pantry doorway toward the foreground, carrying a grocery basket with both hands, then continues past and leaves the view to the right. The view stays on the kitchen counter and cabinets."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns right from the kitchen-counter view until an apron hangs centered on the white door. After holding that view, the viewpoint turns back to the opening kitchen view."}, {"clip_id": "06", "clip_prompt": "A first-person view in a sunlit home kitchen facing the apple bowl, wooden cabinets, copper kettle, and pantry doorway. The view stays still except for mild handheld sway. Sunlight and the curtains continue."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed apron fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the apron, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a green apron with three white square patches", "target_aliases": ["apron"], "references": [{"timestamp_seconds": 44.636, "frame_index": 1071, "bbox_xyxy_normalized": [0.16105769230769232, 0.022916666666666665, 0.39302884615384615, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_036_reappear_01", "scene": "Boat Workshop", "video": "videos/synthetic/syn_036.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a private seaside boat workshop facing a wooden workbench with a blue vise, a coiled rope, a brass hanging lamp, and a sea-facing window. A narrow service aisle leads to a far door. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "Hands lift a tape measure from the workbench into clear view, turn it, then put the tape measure back out of the main view. The view stays on the workbench, coiled rope, and sea window."}, {"clip_id": "03", "clip_prompt": "A first-person view in a boat workshop facing the workbench, blue vise, coiled rope, brass lamp, sea window, and service aisle. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the workbench-aisle view until a life jacket hangs centered on the white wall. After holding that view, the viewpoint turns back to the opening workshop view."}, {"clip_id": "05", "clip_prompt": "A workshop assistant walks in from the near left down the service aisle, carrying a tool bag, then continues toward the far doorway and leaves through it. The view stays on the workbench and aisle."}, {"clip_id": "06", "clip_prompt": "A first-person view in a boat workshop facing the workbench, blue vise, coiled rope, brass lamp, sea window, and service aisle. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical tape measure from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the tape measure. The action is explicit and continuous: the same hands naturally lift the same tape measure from the workbench into clear view. Preserve the tape measure's exact instance identity, case geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a yellow tape measure with one blue stripe", "target_aliases": ["tape measure"], "references": [{"timestamp_seconds": 13.086, "frame_index": 314, "bbox_xyxy_normalized": [0.18389423076923078, 0.46875, 0.5348557692307693, 0.9979166666666667]}]}
+{"type": "synthetic", "task_id": "syn_036_reappear_02", "scene": "Boat Workshop", "video": "videos/synthetic/syn_036.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a private seaside boat workshop facing a wooden workbench with a blue vise, a coiled rope, a brass hanging lamp, and a sea-facing window. A narrow service aisle leads to a far door. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "Hands lift a tape measure from the workbench into clear view, turn it, then put the tape measure back out of the main view. The view stays on the workbench, coiled rope, and sea window."}, {"clip_id": "03", "clip_prompt": "A first-person view in a boat workshop facing the workbench, blue vise, coiled rope, brass lamp, sea window, and service aisle. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the workbench-aisle view until a life jacket hangs centered on the white wall. After holding that view, the viewpoint turns back to the opening workshop view."}, {"clip_id": "05", "clip_prompt": "A workshop assistant walks in from the near left down the service aisle, carrying a tool bag, then continues toward the far doorway and leaves through it. The view stays on the workbench and aisle."}, {"clip_id": "06", "clip_prompt": "A first-person view in a boat workshop facing the workbench, blue vise, coiled rope, brass lamp, sea window, and service aisle. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. The viewpoint stays in the same boat workshop, facing the same workbench and service aisle. The same workshop assistant walks from the near left down the aisle toward the far doorway, carrying the exact same physical tool bag seen earlier, and continues along the same path until they leave through that doorway. Treat the preceding video as the complete and authoritative visual reference for the assistant and the tool bag. Match their exact instance identity, the same bag structure, proportions and handles, and the same carrying posture, walking direction and path from the preceding context. Maintain the established scene, spatial layout, lighting, perspective, viewpoint behavior, and visual style, with natural and temporally smooth motion.", "task_type": "reappear", "target_label": "a blue canvas tool bag with two tan handles", "target_aliases": ["tool bag"], "references": [{"timestamp_seconds": 43.211, "frame_index": 1037, "bbox_xyxy_normalized": [0.17548076923076922, 0.4041666666666667, 0.3112980769230769, 0.6958333333333333]}]}
+{"type": "synthetic", "task_id": "syn_036_revisit_01", "scene": "Boat Workshop", "video": "videos/synthetic/syn_036.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a private seaside boat workshop facing a wooden workbench with a blue vise, a coiled rope, a brass hanging lamp, and a sea-facing window. A narrow service aisle leads to a far door. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "Hands lift a tape measure from the workbench into clear view, turn it, then put the tape measure back out of the main view. The view stays on the workbench, coiled rope, and sea window."}, {"clip_id": "03", "clip_prompt": "A first-person view in a boat workshop facing the workbench, blue vise, coiled rope, brass lamp, sea window, and service aisle. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the workbench-aisle view until a life jacket hangs centered on the white wall. After holding that view, the viewpoint turns back to the opening workshop view."}, {"clip_id": "05", "clip_prompt": "A workshop assistant walks in from the near left down the service aisle, carrying a tool bag, then continues toward the far doorway and leaves through it. The view stays on the workbench and aisle."}, {"clip_id": "06", "clip_prompt": "A first-person view in a boat workshop facing the workbench, blue vise, coiled rope, brass lamp, sea window, and service aisle. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed life jacket fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the life jacket, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "an orange life jacket with two white buckles", "target_aliases": ["life jacket"], "references": [{"timestamp_seconds": 34.898, "frame_index": 838, "bbox_xyxy_normalized": [0.2848557692307692, 0.0, 0.7223557692307693, 0.9166666666666666]}]}
+{"type": "synthetic", "task_id": "syn_037_reappear_01", "scene": "Greenhouse", "video": "videos/synthetic/syn_037.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a private greenhouse potting bench facing a soil tray, a hand trowel, terracotta pots, hanging vines, and misted glass panels. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "Hands bring a green plant mister with white dots into clear view, hold it in the foreground, then take the plant mister out of view. The view stays on the soil tray, trowel, and greenhouse glass."}, {"clip_id": "03", "clip_prompt": "A first-person view at a greenhouse potting bench facing the soil tray, trowel, terracotta pots, hanging vines, and glass panels. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "A gardener walks in through the rear glass door on the right, carrying a watering can, then continues toward the right and leaves the view. The view stays on the potting bench."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns left from the potting-bench view until purple rubber boots with white daisy marks stand on a wooden shelf among nursery pots. After holding that view, the viewpoint turns back to the opening potting-bench view."}, {"clip_id": "06", "clip_prompt": "A first-person view at a greenhouse potting bench facing the soil tray, trowel, terracotta pots, hanging vines, and glass panels. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical plant mister from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the plant mister. The action is explicit and continuous: the same hands naturally bring the same plant mister into clear view. Preserve the plant mister's exact instance identity, bottle-and-nozzle geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a green plant mister with small white dots", "target_aliases": ["plant mister"], "references": [{"timestamp_seconds": 13.044, "frame_index": 313, "bbox_xyxy_normalized": [0.23557692307692307, 0.010416666666666666, 0.7151442307692307, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_037_reappear_02", "scene": "Greenhouse", "video": "videos/synthetic/syn_037.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a private greenhouse potting bench facing a soil tray, a hand trowel, terracotta pots, hanging vines, and misted glass panels. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "Hands bring a green plant mister with white dots into clear view, hold it in the foreground, then take the plant mister out of view. The view stays on the soil tray, trowel, and greenhouse glass."}, {"clip_id": "03", "clip_prompt": "A first-person view at a greenhouse potting bench facing the soil tray, trowel, terracotta pots, hanging vines, and glass panels. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "A gardener walks in through the rear glass door on the right, carrying a watering can, then continues toward the right and leaves the view. The view stays on the potting bench."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns left from the potting-bench view until purple rubber boots with white daisy marks stand on a wooden shelf among nursery pots. After holding that view, the viewpoint turns back to the opening potting-bench view."}, {"clip_id": "06", "clip_prompt": "A first-person view at a greenhouse potting bench facing the soil tray, trowel, terracotta pots, hanging vines, and glass panels. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. The viewpoint stays at the same potting bench, facing the same soil tray, pots, vines, and rear glass door. The same gardener walks in through that rear glass door toward the right, carrying the exact same physical watering can seen earlier, and continues along the same path until they leave the view. Treat the preceding video as the complete and authoritative visual reference for the gardener and the watering can. Match their exact instance identity, the same can structure, proportions and spout, and the same carrying posture, walking direction and path from the preceding context. Maintain the established scene, spatial layout, lighting, perspective, viewpoint behavior, and visual style, with natural and temporally smooth motion.", "task_type": "reappear", "target_label": "an orange watering can with one cream band", "target_aliases": ["watering can"], "references": [{"timestamp_seconds": 34.932, "frame_index": 838, "bbox_xyxy_normalized": [0.6995192307692307, 0.33125, 0.8088942307692307, 0.50625]}]}
+{"type": "synthetic", "task_id": "syn_037_revisit_01", "scene": "Greenhouse", "video": "videos/synthetic/syn_037.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a private greenhouse potting bench facing a soil tray, a hand trowel, terracotta pots, hanging vines, and misted glass panels. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "Hands bring a green plant mister with white dots into clear view, hold it in the foreground, then take the plant mister out of view. The view stays on the soil tray, trowel, and greenhouse glass."}, {"clip_id": "03", "clip_prompt": "A first-person view at a greenhouse potting bench facing the soil tray, trowel, terracotta pots, hanging vines, and glass panels. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "A gardener walks in through the rear glass door on the right, carrying a watering can, then continues toward the right and leaves the view. The view stays on the potting bench."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns left from the potting-bench view until purple rubber boots with white daisy marks stand on a wooden shelf among nursery pots. After holding that view, the viewpoint turns back to the opening potting-bench view."}, {"clip_id": "06", "clip_prompt": "A first-person view at a greenhouse potting bench facing the soil tray, trowel, terracotta pots, hanging vines, and glass panels. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed rubber boots fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the rubber boots, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a pair of purple rubber boots with white daisy marks", "target_aliases": ["rubber boots"], "references": [{"timestamp_seconds": 44.331, "frame_index": 1064, "bbox_xyxy_normalized": [0.2920673076923077, 0.10208333333333333, 0.6850961538461539, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_038_reappear_01", "scene": "Balcony", "video": "videos/synthetic/syn_038.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a balcony breakfast table facing a wooden table, a plate, a water glass, and a balcony city view. Sheer curtains hang beside the window. The view stays still except for mild handheld sway. Sunlight and the curtains move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at a balcony breakfast table facing a plate, a glass, and a city view. The view stays still except for mild handheld sway. Sunlight shifts slightly on the table."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns left from the breakfast-table view until a chair beside the table fills the near view and centers a leaf-patterned chair cushion. After holding that view, the viewpoint turns back to the opening table view."}, {"clip_id": "04", "clip_prompt": "A first-person view at a balcony breakfast table facing a plate, a glass, and a city view. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "Hands bring a cup into clear view, grasp it, lift it toward eye level, then lower the cup out of view. The view stays on the breakfast table and balcony."}, {"clip_id": "06", "clip_prompt": "A first-person view at a balcony breakfast table facing a plate, a glass, and a city view. Sheer curtains billow slightly in the breeze. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical cup from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the cup. The action is explicit and continuous: the same hands naturally bring the same cup back into clear view, grasp it in the same manner, lift it toward the viewer, and continue the observed handling motion. Preserve the cup's exact instance identity, body and handle geometry, dimensions, proportions, rim, base, decorative pattern, color layout, material, texture, markings, surface details, visible side, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a cream ceramic cup with one blue wave pattern", "target_aliases": ["cup"], "references": [{"timestamp_seconds": 43.776, "frame_index": 1051, "bbox_xyxy_normalized": [0.22355769230769232, 0.18958333333333333, 0.7992788461538461, 0.90625]}]}
+{"type": "synthetic", "task_id": "syn_038_revisit_01", "scene": "Balcony", "video": "videos/synthetic/syn_038.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a balcony breakfast table facing a wooden table, a plate, a water glass, and a balcony city view. Sheer curtains hang beside the window. The view stays still except for mild handheld sway. Sunlight and the curtains move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at a balcony breakfast table facing a plate, a glass, and a city view. The view stays still except for mild handheld sway. Sunlight shifts slightly on the table."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns left from the breakfast-table view until a chair beside the table fills the near view and centers a leaf-patterned chair cushion. After holding that view, the viewpoint turns back to the opening table view."}, {"clip_id": "04", "clip_prompt": "A first-person view at a balcony breakfast table facing a plate, a glass, and a city view. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "Hands bring a cup into clear view, grasp it, lift it toward eye level, then lower the cup out of view. The view stays on the breakfast table and balcony."}, {"clip_id": "06", "clip_prompt": "A first-person view at a balcony breakfast table facing a plate, a glass, and a city view. Sheer curtains billow slightly in the breeze. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed chair cushion fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the chair cushion, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a yellow chair cushion with three green leaf shapes", "target_aliases": ["chair cushion"], "references": [{"timestamp_seconds": 25.04, "frame_index": 601, "bbox_xyxy_normalized": [0.15504807692307693, 0.4125, 0.7223557692307693, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_039_reappear_01", "scene": "Study", "video": "videos/synthetic/syn_039.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view at a wooden desk in a calm home study. A closed laptop, a pencil cup, and a brass reading lamp sit on the desk. A bookshelf, a closed wooden door, and a linen-curtained window fill the background. The view stays still except for mild handheld sway. Sunlight and the curtain shadows move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person seated view at a home-study desk facing the closed laptop, pencil cup, brass lamp, bookshelf, wooden door, and curtained window. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands lift a notebook from below the desk into clear view, hold it so the closed red cover and gold star are visible, then take the notebook out of view. The view stays on the desk and window."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the desk view until a globe stands centered on the desk beside the window. After holding that view, the viewpoint turns back to the opening desk view."}, {"clip_id": "05", "clip_prompt": "A household member walks in from the left behind the desk, carrying a storage box with both hands, then continues toward the wooden door and leaves through it. The view stays on the desk."}, {"clip_id": "06", "clip_prompt": "A first-person seated view at a home-study desk facing the closed laptop, pencil cup, brass lamp, bookshelf, closed wooden door, and curtained window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical notebook from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the notebook. The action is explicit and continuous: the same hands naturally lift the same notebook from below the desk into clear view. Preserve the notebook's exact instance identity, closed-cover geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a red pocket notebook with one gold star", "target_aliases": ["notebook"], "references": [{"timestamp_seconds": 22.95, "frame_index": 551, "bbox_xyxy_normalized": [0.3762019230769231, 0.325, 0.6298076923076923, 0.9416666666666667]}]}
+{"type": "synthetic", "task_id": "syn_039_reappear_02", "scene": "Study", "video": "videos/synthetic/syn_039.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view at a wooden desk in a calm home study. A closed laptop, a pencil cup, and a brass reading lamp sit on the desk. A bookshelf, a closed wooden door, and a linen-curtained window fill the background. The view stays still except for mild handheld sway. Sunlight and the curtain shadows move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person seated view at a home-study desk facing the closed laptop, pencil cup, brass lamp, bookshelf, wooden door, and curtained window. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands lift a notebook from below the desk into clear view, hold it so the closed red cover and gold star are visible, then take the notebook out of view. The view stays on the desk and window."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the desk view until a globe stands centered on the desk beside the window. After holding that view, the viewpoint turns back to the opening desk view."}, {"clip_id": "05", "clip_prompt": "A household member walks in from the left behind the desk, carrying a storage box with both hands, then continues toward the wooden door and leaves through it. The view stays on the desk."}, {"clip_id": "06", "clip_prompt": "A first-person seated view at a home-study desk facing the closed laptop, pencil cup, brass lamp, bookshelf, closed wooden door, and curtained window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. The viewpoint stays at the same desk, facing the same laptop, lamp, bookshelf, wooden door, and window. The same household member walks in from the left behind the desk toward the wooden door, carrying the exact same physical storage box seen earlier with both hands, and continues through that door until they leave the view. Treat the preceding video as the complete and authoritative visual reference for the household member and the storage box. Match their exact instance identity, the same box structure, proportions and handles, and the same carrying posture, walking direction and path from the preceding context. Maintain the established scene, spatial layout, lighting, perspective, viewpoint behavior, and visual style, with natural and temporally smooth motion.", "task_type": "reappear", "target_label": "a green storage box with two white handles", "target_aliases": ["storage box"], "references": [{"timestamp_seconds": 42.187, "frame_index": 1012, "bbox_xyxy_normalized": [0.1658653846153846, 0.2833333333333333, 0.3701923076923077, 0.6729166666666667]}]}
+{"type": "synthetic", "task_id": "syn_039_revisit_01", "scene": "Study", "video": "videos/synthetic/syn_039.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person seated view at a wooden desk in a calm home study. A closed laptop, a pencil cup, and a brass reading lamp sit on the desk. A bookshelf, a closed wooden door, and a linen-curtained window fill the background. The view stays still except for mild handheld sway. Sunlight and the curtain shadows move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person seated view at a home-study desk facing the closed laptop, pencil cup, brass lamp, bookshelf, wooden door, and curtained window. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands lift a notebook from below the desk into clear view, hold it so the closed red cover and gold star are visible, then take the notebook out of view. The view stays on the desk and window."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the desk view until a globe stands centered on the desk beside the window. After holding that view, the viewpoint turns back to the opening desk view."}, {"clip_id": "05", "clip_prompt": "A household member walks in from the left behind the desk, carrying a storage box with both hands, then continues toward the wooden door and leaves through it. The view stays on the desk."}, {"clip_id": "06", "clip_prompt": "A first-person seated view at a home-study desk facing the closed laptop, pencil cup, brass lamp, bookshelf, closed wooden door, and curtained window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed globe fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the globe, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a blue tabletop globe with one brass base", "target_aliases": ["globe"], "references": [{"timestamp_seconds": 34.531, "frame_index": 829, "bbox_xyxy_normalized": [0.34975961538461536, 0.19583333333333333, 0.7103365384615384, 0.8854166666666666]}]}
+{"type": "synthetic", "task_id": "syn_040_reappear_01", "scene": "Lakeside Shelter", "video": "videos/synthetic/syn_040.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view inside a lakeside shelter looking out a wooden window onto a lake. A map lies on the windowsill. Reeds stand along the near shore. The view stays still except for mild handheld sway. Water reflections and clouds move slowly."}, {"clip_id": "02", "clip_prompt": "A first-person view inside a lakeside shelter looking out a wooden window onto a lake. A map lies on the windowsill. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands lift a slender cylindrical thermos with its screw-top lid from a canvas day bag into clear view, then lower the thermos out of view. The view stays looking out the shelter window onto the lake."}, {"clip_id": "04", "clip_prompt": "The viewpoint stays inside a lakeside shelter, looking out through a wooden window onto a lake. Outside that opening, a shelter attendant walks past from the left side to the right side, carrying a compact folded camping chair, then leaves the view."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns left past a canvas side flap until a rear wooden bench and plank wall fill the view and center a backpack standing there. After holding that view, the viewpoint turns back to the opening window view."}, {"clip_id": "06", "clip_prompt": "A first-person view inside a lakeside shelter looking out a wooden window onto a lake. A map lies on the windowsill. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical slender cylindrical thermos with its screw-top lid from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the thermos. The action is explicit and continuous: the same hands naturally lift the same slender cylindrical thermos from the canvas day bag back into clear view. Preserve the thermos's exact instance identity, body and lid geometry, dimensions, proportions, neck rings, base, decorative-marking layout, materials, texture, wear, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a silver thermos with one green zigzag band", "target_aliases": ["thermos"], "references": [{"timestamp_seconds": 25.328, "frame_index": 608, "bbox_xyxy_normalized": [0.3942307692307692, 0.20625, 0.5805288461538461, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_040_reappear_02", "scene": "Lakeside Shelter", "video": "videos/synthetic/syn_040.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view inside a lakeside shelter looking out a wooden window onto a lake. A map lies on the windowsill. Reeds stand along the near shore. The view stays still except for mild handheld sway. Water reflections and clouds move slowly."}, {"clip_id": "02", "clip_prompt": "A first-person view inside a lakeside shelter looking out a wooden window onto a lake. A map lies on the windowsill. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands lift a slender cylindrical thermos with its screw-top lid from a canvas day bag into clear view, then lower the thermos out of view. The view stays looking out the shelter window onto the lake."}, {"clip_id": "04", "clip_prompt": "The viewpoint stays inside a lakeside shelter, looking out through a wooden window onto a lake. Outside that opening, a shelter attendant walks past from the left side to the right side, carrying a compact folded camping chair, then leaves the view."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns left past a canvas side flap until a rear wooden bench and plank wall fill the view and center a backpack standing there. After holding that view, the viewpoint turns back to the opening window view."}, {"clip_id": "06", "clip_prompt": "A first-person view inside a lakeside shelter looking out a wooden window onto a lake. A map lies on the windowsill. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. The viewpoint stays inside the same shelter, looking out through the same window opening onto the same lake. Outside that opening, the same shelter attendant walks past from the left side to the right side, carrying the exact same physical compact folded camping chair seen earlier, and continues along the same path until they leave the view. Treat the preceding video as the complete and authoritative visual reference for the attendant and the folded chair. Match their exact instance identity, the same folded-chair structure, proportions and fittings, and the same carrying posture, walking direction and path from the preceding context. Maintain the established shelter interior, window framing, spatial layout, lighting, perspective, viewpoint behavior, and visual style, with natural and temporally smooth motion.", "task_type": "reappear", "target_label": "an orange folded metal camping chair, a narrow rectangular folded frame with visible silver tubular chair legs and two gray securing straps", "target_aliases": ["folding chair"], "references": [{"timestamp_seconds": 34.581, "frame_index": 830, "bbox_xyxy_normalized": [0.38100961538461536, 0.11041666666666666, 0.6754807692307693, 0.7416666666666667]}]}
+{"type": "synthetic", "task_id": "syn_040_revisit_01", "scene": "Lakeside Shelter", "video": "videos/synthetic/syn_040.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view inside a lakeside shelter looking out a wooden window onto a lake. A map lies on the windowsill. Reeds stand along the near shore. The view stays still except for mild handheld sway. Water reflections and clouds move slowly."}, {"clip_id": "02", "clip_prompt": "A first-person view inside a lakeside shelter looking out a wooden window onto a lake. A map lies on the windowsill. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands lift a slender cylindrical thermos with its screw-top lid from a canvas day bag into clear view, then lower the thermos out of view. The view stays looking out the shelter window onto the lake."}, {"clip_id": "04", "clip_prompt": "The viewpoint stays inside a lakeside shelter, looking out through a wooden window onto a lake. Outside that opening, a shelter attendant walks past from the left side to the right side, carrying a compact folded camping chair, then leaves the view."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns left past a canvas side flap until a rear wooden bench and plank wall fill the view and center a backpack standing there. After holding that view, the viewpoint turns back to the opening window view."}, {"clip_id": "06", "clip_prompt": "A first-person view inside a lakeside shelter looking out a wooden window onto a lake. A map lies on the windowsill. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed backpack fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the backpack, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a yellow backpack with one blue square patch", "target_aliases": ["backpack"], "references": [{"timestamp_seconds": 47.252, "frame_index": 1134, "bbox_xyxy_normalized": [0.3485576923076923, 0.3854166666666667, 0.5745192307692307, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_041_reappear_01", "scene": "Bicycle Workshop", "video": "videos/synthetic/syn_041.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a bicycle-workshop workbench facing wrenches on a foam mat, a blue parts tray, red tool cabinets, and an open garage door to a sunlit yard. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns left from the workbench view until a floor pump stands centered on the floor against the wall. After holding that view, the viewpoint turns back to the opening workbench view."}, {"clip_id": "03", "clip_prompt": "A first-person view at a bicycle-workshop workbench facing the wrench mat, blue tray, tool cabinets, and open garage door. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "Hands bring a wrench into clear view, hold it horizontally in the foreground, then take the wrench out of view. The view stays on the workbench and open garage door."}, {"clip_id": "05", "clip_prompt": "A mechanic walks in through the open garage door toward the foreground, carrying a bicycle wheel upright, then continues toward the right and leaves the view. The view stays on the workbench."}, {"clip_id": "06", "clip_prompt": "A first-person view at a bicycle-workshop workbench facing the wrench mat, blue tray, tool cabinets, and open garage door. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical wrench from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the wrench. The action is explicit and continuous: the same hands naturally bring the same wrench into clear view. Preserve the wrench's exact instance identity, adjustable-head geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a red adjustable wrench with one black grip", "target_aliases": ["wrench"], "references": [{"timestamp_seconds": 33.499, "frame_index": 804, "bbox_xyxy_normalized": [0.25, 0.3458333333333333, 0.8076923076923077, 0.7020833333333333]}]}
+{"type": "synthetic", "task_id": "syn_041_reappear_02", "scene": "Bicycle Workshop", "video": "videos/synthetic/syn_041.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a bicycle-workshop workbench facing wrenches on a foam mat, a blue parts tray, red tool cabinets, and an open garage door to a sunlit yard. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns left from the workbench view until a floor pump stands centered on the floor against the wall. After holding that view, the viewpoint turns back to the opening workbench view."}, {"clip_id": "03", "clip_prompt": "A first-person view at a bicycle-workshop workbench facing the wrench mat, blue tray, tool cabinets, and open garage door. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "Hands bring a wrench into clear view, hold it horizontally in the foreground, then take the wrench out of view. The view stays on the workbench and open garage door."}, {"clip_id": "05", "clip_prompt": "A mechanic walks in through the open garage door toward the foreground, carrying a bicycle wheel upright, then continues toward the right and leaves the view. The view stays on the workbench."}, {"clip_id": "06", "clip_prompt": "A first-person view at a bicycle-workshop workbench facing the wrench mat, blue tray, tool cabinets, and open garage door. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. The viewpoint stays at the same workbench, facing the same tool mat, cabinets, and open garage door. The same mechanic walks in through that garage door toward the foreground, carrying the exact same physical bicycle wheel upright, then continues toward the right until they leave the view. Treat the preceding video as the complete and authoritative visual reference for the mechanic and the bicycle wheel. Match their exact instance identity, the same wheel structure, proportions and hub, and the same upright carrying posture, walking direction and path from the preceding context. Maintain the established scene, spatial layout, lighting, perspective, viewpoint behavior, and visual style, with natural and temporally smooth motion.", "task_type": "reappear", "target_label": "a blue bicycle wheel with one white reflector", "target_aliases": ["bicycle wheel"], "references": [{"timestamp_seconds": 47.342, "frame_index": 1136, "bbox_xyxy_normalized": [0.7475961538461539, 0.4979166666666667, 0.9579326923076923, 0.9583333333333334]}]}
+{"type": "synthetic", "task_id": "syn_042_reappear_01", "scene": "Craft Room", "video": "videos/synthetic/syn_042.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a sunlit craft-room worktable facing a green cutting mat, a white box, a pencil jar, a small lamp, and a curtained window. The view stays still except for mild handheld sway. Sunlight and leaf shadows move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at a craft-room worktable facing the green cutting mat, white box, pencil jar, lamp, and curtained window. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands bring a pencil case into clear view, hold it in the foreground, then take the pencil case out of view. The view stays on the worktable and window."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns left from the worktable view until a tote bag hangs centered on the wall beside the doorway. After holding that view, the viewpoint turns back to the opening worktable view."}, {"clip_id": "05", "clip_prompt": "A first-person view at a craft-room worktable facing the green cutting mat, white box, pencil jar, lamp, and curtained window. The view stays still except for mild handheld sway. Leaf shadows continue."}, {"clip_id": "06", "clip_prompt": "A first-person view at a craft-room worktable facing the green cutting mat, white box, pencil jar, lamp, and curtained window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical pencil case from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the pencil case. The action is explicit and continuous: the same hands naturally bring the same pencil case into clear view. Preserve the pencil case's exact instance identity, zippered-pouch geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a closed purple zippered pencil case with three white dots", "target_aliases": ["pencil case"], "references": [{"timestamp_seconds": 23.479, "frame_index": 563, "bbox_xyxy_normalized": [0.11899038461538461, 0.26458333333333334, 0.8449519230769231, 0.8354166666666667]}]}
+{"type": "synthetic", "task_id": "syn_042_revisit_01", "scene": "Craft Room", "video": "videos/synthetic/syn_042.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a sunlit craft-room worktable facing a green cutting mat, a white box, a pencil jar, a small lamp, and a curtained window. The view stays still except for mild handheld sway. Sunlight and leaf shadows move slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at a craft-room worktable facing the green cutting mat, white box, pencil jar, lamp, and curtained window. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands bring a pencil case into clear view, hold it in the foreground, then take the pencil case out of view. The view stays on the worktable and window."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns left from the worktable view until a tote bag hangs centered on the wall beside the doorway. After holding that view, the viewpoint turns back to the opening worktable view."}, {"clip_id": "05", "clip_prompt": "A first-person view at a craft-room worktable facing the green cutting mat, white box, pencil jar, lamp, and curtained window. The view stays still except for mild handheld sway. Leaf shadows continue."}, {"clip_id": "06", "clip_prompt": "A first-person view at a craft-room worktable facing the green cutting mat, white box, pencil jar, lamp, and curtained window. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left until the previously observed tote bag fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the tote bag, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "an orange canvas tote bag with one blue horizontal stripe", "target_aliases": ["tote bag"], "references": [{"timestamp_seconds": 36.133, "frame_index": 867, "bbox_xyxy_normalized": [0.36177884615384615, 0.0, 0.5985576923076923, 0.5729166666666666]}]}
+{"type": "synthetic", "task_id": "syn_043_reappear_01", "scene": "Music Room", "video": "videos/synthetic/syn_043.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a home music room facing a black digital piano, a wooden cabinet with a brass lamp and an open book, a curtained window, and a round side table. The view stays still except for mild handheld sway. Sunlight and the curtains move slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the piano view until a guitar hangs centered on the wall. After holding that view, the viewpoint turns back to the opening piano view."}, {"clip_id": "03", "clip_prompt": "A first-person view at a home music room facing the digital piano, brass lamp, open book, curtained window, and round side table. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "Hands bring a sheet-music folder into clear view, hold it in the foreground, then lower the sheet-music folder out of view. The view stays on the piano and window."}, {"clip_id": "05", "clip_prompt": "A first-person view at a home music room facing the digital piano, brass lamp, open book, curtained window, and round side table. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view at a home music room facing the digital piano, brass lamp, open book, curtained window, and round side table. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical sheet-music folder from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the sheet-music folder. The action is explicit and continuous: the same hands naturally bring the same sheet-music folder into clear view. Preserve the sheet-music folder's exact instance identity, closed-folder geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand contact. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a closed blue sheet-music folder with one large orange treble-clef emblem", "target_aliases": ["sheet-music folder"], "references": [{"timestamp_seconds": 34.318, "frame_index": 824, "bbox_xyxy_normalized": [0.3245192307692308, 0.2708333333333333, 0.640625, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_043_revisit_01", "scene": "Music Room", "video": "videos/synthetic/syn_043.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a home music room facing a black digital piano, a wooden cabinet with a brass lamp and an open book, a curtained window, and a round side table. The view stays still except for mild handheld sway. Sunlight and the curtains move slightly."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the piano view until a guitar hangs centered on the wall. After holding that view, the viewpoint turns back to the opening piano view."}, {"clip_id": "03", "clip_prompt": "A first-person view at a home music room facing the digital piano, brass lamp, open book, curtained window, and round side table. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "Hands bring a sheet-music folder into clear view, hold it in the foreground, then lower the sheet-music folder out of view. The view stays on the piano and window."}, {"clip_id": "05", "clip_prompt": "A first-person view at a home music room facing the digital piano, brass lamp, open book, curtained window, and round side table. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view at a home music room facing the digital piano, brass lamp, open book, curtained window, and round side table. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed guitar fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the guitar, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a bright orange acoustic guitar with one wide turquoise shoulder strap", "target_aliases": ["acoustic guitar"], "references": [{"timestamp_seconds": 14.257, "frame_index": 342, "bbox_xyxy_normalized": [0.4230769230769231, 0.04375, 0.5360576923076923, 0.6333333333333333]}]}
+{"type": "synthetic", "task_id": "syn_044_reappear_01", "scene": "Crystal Laboratory", "video": "videos/synthetic/syn_044.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A close first-person view of a glass vessel filled with glowing green liquid and orange organic structures in a cel-shaded crystal-cavern laboratory. The view stays still. Particles drift slowly in the liquid."}, {"clip_id": "02", "clip_prompt": "A gloved hand brings a transparent cylindrical sample tube containing one solid faceted crystal into clear view, then takes the sample tube out of view. A green laboratory vessel stays in the background."}, {"clip_id": "03", "clip_prompt": "The viewpoint tilts upward beyond the glass vessel, revealing a towering luminous crystal formation on the upper cavern wall. After holding that view, the viewpoint returns to the opening vessel view."}, {"clip_id": "04", "clip_prompt": "A gloved hand brings a transparent cylindrical sample tube containing glowing liquid into clear view, then lowers the sample tube out of view. A green laboratory vessel stays in the background."}, {"clip_id": "05", "clip_prompt": "A close first-person view of a glass vessel filled with glowing green liquid and orange organic structures. The view stays still. Particles and the orange structures move slightly."}, {"clip_id": "06", "clip_prompt": "A close first-person view of a glass vessel filled with glowing green liquid and orange organic structures. The view stays still. Particles drift slowly in the liquid."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical transparent cylindrical sample tube containing one solid faceted crystal from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the sample tube and crystal. The action is explicit and continuous: the same gloved hand naturally brings the same transparent sample tube containing the same solid faceted crystal back into clear view. Preserve the sample tube and crystal's exact instance identity, tube and cap geometry, crystal-facet geometry, dimensions, proportions, placement, materials, transparency, luminous behavior, texture, surface details, scale, orientation, motion, and gloved-hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and cel-shaded visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a transparent cylindrical sample tube containing a faceted violet crystal", "target_aliases": ["sample tube"], "references": [{"timestamp_seconds": 16.337, "frame_index": 392, "bbox_xyxy_normalized": [0.4050480769230769, 0.004166666666666667, 0.59375, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_044_reappear_02", "scene": "Crystal Laboratory", "video": "videos/synthetic/syn_044.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A close first-person view of a glass vessel filled with glowing green liquid and orange organic structures in a cel-shaded crystal-cavern laboratory. The view stays still. Particles drift slowly in the liquid."}, {"clip_id": "02", "clip_prompt": "A gloved hand brings a transparent cylindrical sample tube containing one solid faceted crystal into clear view, then takes the sample tube out of view. A green laboratory vessel stays in the background."}, {"clip_id": "03", "clip_prompt": "The viewpoint tilts upward beyond the glass vessel, revealing a towering luminous crystal formation on the upper cavern wall. After holding that view, the viewpoint returns to the opening vessel view."}, {"clip_id": "04", "clip_prompt": "A gloved hand brings a transparent cylindrical sample tube containing glowing liquid into clear view, then lowers the sample tube out of view. A green laboratory vessel stays in the background."}, {"clip_id": "05", "clip_prompt": "A close first-person view of a glass vessel filled with glowing green liquid and orange organic structures. The view stays still. Particles and the orange structures move slightly."}, {"clip_id": "06", "clip_prompt": "A close first-person view of a glass vessel filled with glowing green liquid and orange organic structures. The view stays still. Particles drift slowly in the liquid."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical transparent cylindrical sample tube containing glowing liquid from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the sample tube and liquid. The action is explicit and continuous: the same gloved hand naturally brings the same transparent sample tube containing the same glowing liquid back into clear view. Preserve the sample tube and liquid's exact instance identity, tube and cap geometry, dimensions, proportions, fill level, particle and glow behavior, materials, transparency, texture, surface details, scale, orientation, motion, and gloved-hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and cel-shaded visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "the same transparent cylindrical sample tube containing glowing violet liquid", "target_aliases": ["sample tube"], "references": [{"timestamp_seconds": 35.113, "frame_index": 843, "bbox_xyxy_normalized": [0.41947115384615385, 0.004166666666666667, 0.6213942307692307, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_044_revisit_01", "scene": "Crystal Laboratory", "video": "videos/synthetic/syn_044.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A close first-person view of a glass vessel filled with glowing green liquid and orange organic structures in a cel-shaded crystal-cavern laboratory. The view stays still. Particles drift slowly in the liquid."}, {"clip_id": "02", "clip_prompt": "A gloved hand brings a transparent cylindrical sample tube containing one solid faceted crystal into clear view, then takes the sample tube out of view. A green laboratory vessel stays in the background."}, {"clip_id": "03", "clip_prompt": "The viewpoint tilts upward beyond the glass vessel, revealing a towering luminous crystal formation on the upper cavern wall. After holding that view, the viewpoint returns to the opening vessel view."}, {"clip_id": "04", "clip_prompt": "A gloved hand brings a transparent cylindrical sample tube containing glowing liquid into clear view, then lowers the sample tube out of view. A green laboratory vessel stays in the background."}, {"clip_id": "05", "clip_prompt": "A close first-person view of a glass vessel filled with glowing green liquid and orange organic structures. The view stays still. Particles and the orange structures move slightly."}, {"clip_id": "06", "clip_prompt": "A close first-person view of a glass vessel filled with glowing green liquid and orange organic structures. The view stays still. Particles drift slowly in the liquid."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint tilts fully upward until the previously observed luminous crystal formation fills the view. Follow the same tilt arc and restore the exact earlier target view, preserving the identity and placement of the crystal formation, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a towering luminous cluster of large purple, pink, and blue crystal spires rising through the upper cavern", "target_aliases": ["towering luminous crystal cluster", "glowing crystal cluster"], "references": [{"timestamp_seconds": 22.881, "frame_index": 549, "bbox_xyxy_normalized": [0.013221153846153846, 0.004166666666666667, 1.0, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_045_reappear_01", "scene": "Spaceship Bridge", "video": "videos/synthetic/syn_045.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view on a retro orbital ship catwalk facing down the grated walkway, black railings, linear ceiling lights, and a crate with papers on the floor. The view stays still except for mild first-person sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the catwalk until a starfield observation window fills the view. After holding that view, the viewpoint turns back to the opening catwalk view."}, {"clip_id": "03", "clip_prompt": "A first-person view on an orbital ship catwalk facing down the walkway, railings, ceiling lights, and the crate with papers. The view stays still except for mild first-person sway."}, {"clip_id": "04", "clip_prompt": "A gloved hand brings a compass into the foreground, holds the round brass dial with its glass dome, parchment face, four-pointed star needle, knurled knob, and rim rivets, then lowers the compass out of view. The view stays looking down the catwalk."}, {"clip_id": "05", "clip_prompt": "A first-person view on an orbital ship catwalk facing down the walkway, railings, ceiling lights, and the crate with papers. The view stays still except for mild first-person sway."}, {"clip_id": "06", "clip_prompt": "A first-person view on an orbital ship catwalk facing down the walkway, railings, and linear ceiling lights. The crate and papers remain on the floor. The view stays still except for mild first-person sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical compass from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the compass. The action is explicit and continuous: the same gloved hand naturally brings the same compass back into clear view. Preserve the compass's exact instance identity, round-dial geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and gloved-hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a round brass star-navigation dial with a pale map face and fine compass markings", "target_aliases": ["star-navigation dial"], "references": [{"timestamp_seconds": 33.824, "frame_index": 812, "bbox_xyxy_normalized": [0.16826923076923078, 0.041666666666666664, 0.7752403846153846, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_045_revisit_01", "scene": "Spaceship Bridge", "video": "videos/synthetic/syn_045.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view on a retro orbital ship catwalk facing down the grated walkway, black railings, linear ceiling lights, and a crate with papers on the floor. The view stays still except for mild first-person sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the catwalk until a starfield observation window fills the view. After holding that view, the viewpoint turns back to the opening catwalk view."}, {"clip_id": "03", "clip_prompt": "A first-person view on an orbital ship catwalk facing down the walkway, railings, ceiling lights, and the crate with papers. The view stays still except for mild first-person sway."}, {"clip_id": "04", "clip_prompt": "A gloved hand brings a compass into the foreground, holds the round brass dial with its glass dome, parchment face, four-pointed star needle, knurled knob, and rim rivets, then lowers the compass out of view. The view stays looking down the catwalk."}, {"clip_id": "05", "clip_prompt": "A first-person view on an orbital ship catwalk facing down the walkway, railings, ceiling lights, and the crate with papers. The view stays still except for mild first-person sway."}, {"clip_id": "06", "clip_prompt": "A first-person view on an orbital ship catwalk facing down the walkway, railings, and linear ceiling lights. The crate and papers remain on the floor. The view stays still except for mild first-person sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed starfield observation window fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the starfield observation window, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a wide framed observation window revealing a dense blue starfield", "target_aliases": ["starfield observation window"], "references": [{"timestamp_seconds": 16.637, "frame_index": 399, "bbox_xyxy_normalized": [0.0, 0.0, 0.9387019230769231, 0.9979166666666667]}]}
+{"type": "synthetic", "task_id": "syn_046_reappear_01", "scene": "Rooftop Garden", "video": "videos/synthetic/syn_046.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person downward view from a rooftop garden overlook facing a city intersection, rooftop gardens, streets, and traffic far below. The view stays still except for mild first-person sway."}, {"clip_id": "02", "clip_prompt": "A right hand in a dark sleeve brings a prism into the foreground over the downward city view, holds the transparent six-petal prism with its circular center, then takes the prism out of view. The view stays looking down at the city."}, {"clip_id": "03", "clip_prompt": "A first-person downward view from a rooftop garden overlook facing the city intersection, rooftop gardens, and streets. The view stays still except for mild first-person sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint tilts up from the downward city view until the skyline and monorail fill the horizon, showing neon towers and elevated tracks over parkland. After holding that view, the viewpoint tilts back down to the opening downward overlook."}, {"clip_id": "05", "clip_prompt": "A first-person downward view from a rooftop garden overlook facing the city intersection, rooftop gardens, and streets. The view stays still except for mild first-person sway."}, {"clip_id": "06", "clip_prompt": "A first-person downward view from a rooftop garden overlook facing the city intersection, rooftop gardens, and streets far below. The view stays still except for mild first-person sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical prism from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the prism. The action is explicit and continuous: the same first-person hand naturally brings the same prism back into clear view. Preserve the prism's exact instance identity, flower geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a transparent faceted flower-shaped prism with a circular center", "target_aliases": ["prism"], "references": [{"timestamp_seconds": 13.123, "frame_index": 315, "bbox_xyxy_normalized": [0.3545673076923077, 0.21041666666666667, 0.5769230769230769, 0.6666666666666666]}]}
+{"type": "synthetic", "task_id": "syn_047_reappear_01", "scene": "Riverbank", "video": "videos/synthetic/syn_047.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person voxel-game view across a grassy field toward a river, a waterfall, and a snowy mountain. Yellow and red flowers sit in the grass. A blocky brown hand, a crosshair, and a hotbar stay in view. The view stays on the field except for mild first-person sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the mountain view until an arcade cabinet is centered in the grass, showing a black body, red trim, colorful side art, a lit screen, a marquee, and joysticks. After holding that view, the viewpoint turns back to the opening mountain view."}, {"clip_id": "03", "clip_prompt": "A first-person voxel-game view across a grassy field toward the river, waterfall, and snowy mountain. The brown hand, crosshair, and hotbar remain. The view stays on the field except for mild first-person sway."}, {"clip_id": "04", "clip_prompt": "A first-person hand brings an arcade cartridge into the lower-right foreground, holds the red rectangular cartridge with its white face and pink and green pixels, then keeps it in that near view. The view stays on the grassy field, river, and mountain."}, {"clip_id": "05", "clip_prompt": "A first-person voxel-game view across a grassy field toward the river, waterfall, and snowy mountain. The view stays on the field except for mild first-person sway."}, {"clip_id": "06", "clip_prompt": "A first-person voxel-game view across a grassy field toward the river, waterfall, and snowy mountain. Yellow and red flowers remain in the grass. The view stays on the field except for mild first-person sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical arcade cartridge from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the arcade cartridge. The action is explicit and continuous: the same first-person hand naturally brings the same arcade cartridge back into the lower-right foreground. Preserve the arcade cartridge's exact instance identity, rectangular-block geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a red rectangular arcade cartridge shown in the player's hand", "target_aliases": ["arcade cartridge"], "references": [{"timestamp_seconds": 33.546, "frame_index": 805, "bbox_xyxy_normalized": [0.7331730769230769, 0.45416666666666666, 1.0, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_047_revisit_01", "scene": "Riverbank", "video": "videos/synthetic/syn_047.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person voxel-game view across a grassy field toward a river, a waterfall, and a snowy mountain. Yellow and red flowers sit in the grass. A blocky brown hand, a crosshair, and a hotbar stay in view. The view stays on the field except for mild first-person sway."}, {"clip_id": "02", "clip_prompt": "The viewpoint turns right from the mountain view until an arcade cabinet is centered in the grass, showing a black body, red trim, colorful side art, a lit screen, a marquee, and joysticks. After holding that view, the viewpoint turns back to the opening mountain view."}, {"clip_id": "03", "clip_prompt": "A first-person voxel-game view across a grassy field toward the river, waterfall, and snowy mountain. The brown hand, crosshair, and hotbar remain. The view stays on the field except for mild first-person sway."}, {"clip_id": "04", "clip_prompt": "A first-person hand brings an arcade cartridge into the lower-right foreground, holds the red rectangular cartridge with its white face and pink and green pixels, then keeps it in that near view. The view stays on the grassy field, river, and mountain."}, {"clip_id": "05", "clip_prompt": "A first-person voxel-game view across a grassy field toward the river, waterfall, and snowy mountain. The view stays on the field except for mild first-person sway."}, {"clip_id": "06", "clip_prompt": "A first-person voxel-game view across a grassy field toward the river, waterfall, and snowy mountain. Yellow and red flowers remain in the grass. The view stays on the field except for mild first-person sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed arcade cabinet fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the arcade cabinet, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a freestanding red arcade cabinet with a black screen and colorful marquee", "target_aliases": ["arcade cabinet"], "references": [{"timestamp_seconds": 16.716, "frame_index": 401, "bbox_xyxy_normalized": [0.2956730769230769, 0.06041666666666667, 0.7307692307692307, 0.9895833333333334]}]}
+{"type": "synthetic", "task_id": "syn_048_reappear_01", "scene": "Forest Path", "video": "videos/synthetic/syn_048.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "The view moves slowly forward along a sunlit stone path through a forest, with pale rocks, grass, and dense trees on both sides. The view keeps moving forward."}, {"clip_id": "02", "clip_prompt": "The view keeps moving slowly forward along a forest stone path, with rocks, grass, and trees on both sides. The path ahead advances."}, {"clip_id": "03", "clip_prompt": "The view keeps moving slowly forward along a forest stone path under a bright sky. Rocks and trees pass on both sides."}, {"clip_id": "04", "clip_prompt": "While the view keeps moving slowly forward, both gloved hands raise a handheld tablet into the lower foreground, hold the thick gray tablet with yellow corner bumpers and a glowing blue lunar display, then lower the handheld tablet out of view."}, {"clip_id": "05", "clip_prompt": "The view keeps moving slowly forward along a forest stone path, with rocks, grass, and trees on both sides."}, {"clip_id": "06", "clip_prompt": "The view keeps moving slowly forward along a forest stone path under a bright sky."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical handheld tablet from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the handheld tablet. The action is explicit and continuous: the same gloved hands naturally bring the same handheld tablet back into the lower foreground while continuing to walk forward. Preserve the handheld tablet's exact instance identity, rectangular geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and gloved-hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a rectangular handheld access badge with a dark blue lunar display and reinforced corner guards", "target_aliases": ["access badge"], "references": [{"timestamp_seconds": 34.869, "frame_index": 837, "bbox_xyxy_normalized": [0.2776442307692308, 0.01875, 0.7235576923076923, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_049_reappear_01", "scene": "Forest Path", "video": "videos/synthetic/syn_049.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "The view moves slowly forward along a tan dirt path through a low-poly forest of conifers and rounded trees, with angular rocks and bright green grass. The view keeps moving forward."}, {"clip_id": "02", "clip_prompt": "The view keeps moving slowly forward along a low-poly forest dirt path, with conifers, rounded trees, and angular rocks on both sides."}, {"clip_id": "03", "clip_prompt": "The view keeps moving slowly forward along a tan dirt path under a bright sky. Trees and rocks pass on both sides."}, {"clip_id": "04", "clip_prompt": "While the view keeps moving slowly forward, pink-purple blocky hands bring a map into the lower foreground and hold it open, showing green land, blue water, a winding path, and red and blue pins. The hands then lower the map out of view."}, {"clip_id": "05", "clip_prompt": "The view keeps moving slowly forward along a low-poly forest dirt path, with conifers, rounded trees, and angular rocks."}, {"clip_id": "06", "clip_prompt": "The view keeps moving slowly forward along a tan dirt path through the low-poly forest."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical map from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the map. The action is explicit and continuous: the same first-person hands naturally bring the same map back into the lower foreground and hold it open while continuing to walk forward. Preserve the map's exact instance identity, open-sheet geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a folded paper trail map with pale route lines and several colored location pins", "target_aliases": ["trail map"], "references": [{"timestamp_seconds": 34.632, "frame_index": 831, "bbox_xyxy_normalized": [0.23197115384615385, 0.4708333333333333, 0.7463942307692307, 1.0]}]}
+{"type": "synthetic", "task_id": "syn_050_reappear_01", "scene": "Stationery Shop", "video": "videos/synthetic/syn_050.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a narrow Kyoto stationery shop facing a wooden aisle, dense shelves, a tiered card island, and warm ceiling lights. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A first-person hand brings a notebook into the foreground, holds the cobalt-blue notebook with its white vertical title slip and narrow elastic band, tilts it, then takes the notebook out of view. The view stays on the shop aisle."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the aisle view until paper lanterns are centered in front of a street window, showing white spherical lanterns with black calligraphy and some red and green sections. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "04", "clip_prompt": "First-person hands bring a pen case into the foreground, hold the slim black cylindrical case upright with its brass cap and band, turn it, and keep inspecting it. The view stays on the shop aisle."}, {"clip_id": "05", "clip_prompt": "A first-person view in a Kyoto stationery shop facing the wooden aisle, dense shelves, and the tiered card island. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a Kyoto stationery shop facing the wooden aisle, dense shelves, the tiered card island, and warm ceiling lights. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical notebook from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the notebook. The action is explicit and continuous: the same first-person hand naturally brings the same notebook back into clear view. Preserve the notebook's exact instance identity, rectangular-cover geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a folded indigo-blue notebook with a white vertical title slip and narrow closure band", "target_aliases": ["notebook"], "references": [{"timestamp_seconds": 12.515, "frame_index": 300, "bbox_xyxy_normalized": [0.25600961538461536, 0.12083333333333333, 0.6105769230769231, 0.9270833333333334]}]}
+{"type": "synthetic", "task_id": "syn_050_reappear_02", "scene": "Stationery Shop", "video": "videos/synthetic/syn_050.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a narrow Kyoto stationery shop facing a wooden aisle, dense shelves, a tiered card island, and warm ceiling lights. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A first-person hand brings a notebook into the foreground, holds the cobalt-blue notebook with its white vertical title slip and narrow elastic band, tilts it, then takes the notebook out of view. The view stays on the shop aisle."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the aisle view until paper lanterns are centered in front of a street window, showing white spherical lanterns with black calligraphy and some red and green sections. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "04", "clip_prompt": "First-person hands bring a pen case into the foreground, hold the slim black cylindrical case upright with its brass cap and band, turn it, and keep inspecting it. The view stays on the shop aisle."}, {"clip_id": "05", "clip_prompt": "A first-person view in a Kyoto stationery shop facing the wooden aisle, dense shelves, and the tiered card island. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a Kyoto stationery shop facing the wooden aisle, dense shelves, the tiered card island, and warm ceiling lights. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical pen case from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the pen case. The action is explicit and continuous: the same first-person hands naturally bring the same pen case back into clear view. Preserve the pen case's exact instance identity, slim cylindrical geometry, dimensions, proportions, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and visual style, with physically plausible and temporally smooth motion.", "task_type": "reappear", "target_label": "a slim black cylindrical fountain-pen case with a brass cap and brass center band", "target_aliases": ["fountain-pen case"], "references": [{"timestamp_seconds": 32.542, "frame_index": 781, "bbox_xyxy_normalized": [0.4879807692307692, 0.020833333333333332, 0.6346153846153846, 0.9458333333333333]}]}
+{"type": "synthetic", "task_id": "syn_050_revisit_01", "scene": "Stationery Shop", "video": "videos/synthetic/syn_050.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a narrow Kyoto stationery shop facing a wooden aisle, dense shelves, a tiered card island, and warm ceiling lights. The view stays still except for mild handheld sway."}, {"clip_id": "02", "clip_prompt": "A first-person hand brings a notebook into the foreground, holds the cobalt-blue notebook with its white vertical title slip and narrow elastic band, tilts it, then takes the notebook out of view. The view stays on the shop aisle."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right from the aisle view until paper lanterns are centered in front of a street window, showing white spherical lanterns with black calligraphy and some red and green sections. After holding that view, the viewpoint turns back to the opening aisle view."}, {"clip_id": "04", "clip_prompt": "First-person hands bring a pen case into the foreground, hold the slim black cylindrical case upright with its brass cap and band, turn it, and keep inspecting it. The view stays on the shop aisle."}, {"clip_id": "05", "clip_prompt": "A first-person view in a Kyoto stationery shop facing the wooden aisle, dense shelves, and the tiered card island. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view in a Kyoto stationery shop facing the wooden aisle, dense shelves, the tiered card island, and warm ceiling lights. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right until the previously observed paper lanterns fills the view. Follow the same turn arc and restore the exact earlier target view, preserving the identity and placement of the paper lanterns, scene geometry, lighting, perspective, visual style, and continuous natural motion.", "task_type": "revisit", "target_label": "a wall-side group of round white paper lanterns with black calligraphy and colored sections", "target_aliases": ["paper lantern wall"], "references": [{"timestamp_seconds": 25.027, "frame_index": 601, "bbox_xyxy_normalized": [0.15745192307692307, 0.06041666666666667, 0.8209134615384616, 1.0]}]}
+{"type": "real", "task_id": "real_001_reappear_01", "scene": "Airport", "video": "videos/real/real_001.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at an airport baggage carousel facing empty brushed-metal slats, a beige inner island, a green EXIT sign, and waiting passengers. A yellow safety line sits on the speckled floor. The view stays still except for mild handheld sway. Carousel slats and background passengers keep moving slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at the same airport baggage carousel. Empty metallic slats continue around the curve. Waiting passengers and the green EXIT sign stay in the background. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands bring a U-shaped travel neck pillow into clear view at chest height, hold it in the foreground, then take the neck pillow out of view. The view stays on the baggage carousel and waiting hall."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns left from the carousel view until a yellow bilingual warning sign fills the near view above the moving slats. After holding that view, the viewpoint turns back to the opening carousel view."}, {"clip_id": "05", "clip_prompt": "A first-person view at the airport baggage carousel facing empty metallic slats, the beige island, and waiting passengers. The green EXIT sign stays in place. The view stays still except for mild handheld sway. Carousel slats and background motion continue."}, {"clip_id": "06", "clip_prompt": "A first-person view at the airport baggage carousel facing empty metallic slats and the waiting hall. The view stays still except for mild handheld sway. Carousel slats, floor reflections, and distant passengers keep moving slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical U-shaped travel neck pillow from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the neck pillow. The action is explicit and continuous: the same hands naturally bring the same U-shaped travel neck pillow back into clear view at chest height. Preserve the neck pillow's exact instance identity, horseshoe geometry, dimensions, proportions, opening gap, end tips, cover seams, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "reappear", "target_label": "a pale ice-blue stretch-knit U-shaped travel neck pillow with a horseshoe opening, visible cover seams, and a soft compressible body", "target_aliases": ["neck pillow", "U-shaped pillow", "travel pillow"], "references": [{"timestamp_seconds": 24.976, "frame_index": null, "bbox_xyxy_normalized": [0.2916666666666667, 0.022222222222222223, 0.9604166666666667, 1.0]}]}
+{"type": "real", "task_id": "real_001_revisit_01", "scene": "Airport", "video": "videos/real/real_001.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at an airport baggage carousel facing empty brushed-metal slats, a beige inner island, a green EXIT sign, and waiting passengers. A yellow safety line sits on the speckled floor. The view stays still except for mild handheld sway. Carousel slats and background passengers keep moving slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view at the same airport baggage carousel. Empty metallic slats continue around the curve. Waiting passengers and the green EXIT sign stay in the background. The view stays still except for mild handheld sway."}, {"clip_id": "03", "clip_prompt": "Hands bring a U-shaped travel neck pillow into clear view at chest height, hold it in the foreground, then take the neck pillow out of view. The view stays on the baggage carousel and waiting hall."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns left from the carousel view until a yellow bilingual warning sign fills the near view above the moving slats. After holding that view, the viewpoint turns back to the opening carousel view."}, {"clip_id": "05", "clip_prompt": "A first-person view at the airport baggage carousel facing empty metallic slats, the beige island, and waiting passengers. The green EXIT sign stays in place. The view stays still except for mild handheld sway. Carousel slats and background motion continue."}, {"clip_id": "06", "clip_prompt": "A first-person view at the airport baggage carousel facing empty metallic slats and the waiting hall. The view stays still except for mild handheld sway. Carousel slats, floor reflections, and distant passengers keep moving slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left along the same natural arc until it restores the exact previously observed view of the carousel warning sign. Match the earlier framing, heading, perspective, target identity and placement, scene geometry, lighting, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "revisit", "target_label": "a yellow bilingual carousel warning sign with a red no-climbing pictogram, the text 严禁攀爬行李转盘! / Do not climb or step on the carousel!, and a lower oversized-baggage-claim arrow strip", "target_aliases": ["warning sign", "carousel sign", "baggage sign"], "references": [{"timestamp_seconds": 36.5, "frame_index": null, "bbox_xyxy_normalized": [0.17708333333333334, 0.06851851851851852, 0.809375, 0.5685185185185185]}]}
+{"type": "real", "task_id": "real_002_reappear_01", "scene": "Restaurant", "video": "videos/real/real_002.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view looking down at a light wood restaurant table. A small dark ceramic cup and two shallow sauce dishes sit across the upper frame. The view stays still except for mild handheld sway. Warm overhead light and liquid surfaces keep shifting slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view of the same restaurant table, cup, and sauce dishes. The lower table surface stays empty. The view stays still except for mild handheld sway. Sauce surfaces and wood-grain reflections continue."}, {"clip_id": "03", "clip_prompt": "A hand brings a small steamed-egg dish on a white saucer into clear view on the table, holds it in the foreground, then takes the dish out of view. The view stays on the wooden table and sauce dishes."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the sauce-dish view until a standing table tent fills the near view on the wooden table. After holding that view, the viewpoint turns back to the opening table view."}, {"clip_id": "05", "clip_prompt": "A first-person view looking down at the same restaurant table, cup, and sauce dishes. Used plates and chopsticks stay farther back. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same restaurant table and sauce dishes. The view stays still except for mild handheld sway. Warm lighting and liquid surfaces keep moving slightly."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical steamed-egg dish from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the dish. The action is explicit and continuous: the same hand naturally brings the same steamed-egg dish on its saucer back into clear view on the table. Preserve the dish's exact instance identity, bowl-and-saucer geometry, dimensions, proportions, saucer rim, toppings, utensil, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "reappear", "target_label": "a white egg-shaped chawanmushi bowl on a scalloped white saucer, topped with shrimp, two green peas, and a dark garnish, with a small silver spoon on the saucer", "target_aliases": ["chawanmushi", "steamed egg custard", "steamed egg dish"], "references": [{"timestamp_seconds": 25.533, "frame_index": null, "bbox_xyxy_normalized": [0.22916666666666666, 0.23333333333333334, 0.6802083333333333, 0.9740740740740741]}]}
+{"type": "real", "task_id": "real_002_revisit_01", "scene": "Restaurant", "video": "videos/real/real_002.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view looking down at a light wood restaurant table. A small dark ceramic cup and two shallow sauce dishes sit across the upper frame. The view stays still except for mild handheld sway. Warm overhead light and liquid surfaces keep shifting slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view of the same restaurant table, cup, and sauce dishes. The lower table surface stays empty. The view stays still except for mild handheld sway. Sauce surfaces and wood-grain reflections continue."}, {"clip_id": "03", "clip_prompt": "A hand brings a small steamed-egg dish on a white saucer into clear view on the table, holds it in the foreground, then takes the dish out of view. The view stays on the wooden table and sauce dishes."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the sauce-dish view until a standing table tent fills the near view on the wooden table. After holding that view, the viewpoint turns back to the opening table view."}, {"clip_id": "05", "clip_prompt": "A first-person view looking down at the same restaurant table, cup, and sauce dishes. Used plates and chopsticks stay farther back. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same restaurant table and sauce dishes. The view stays still except for mild handheld sway. Warm lighting and liquid surfaces keep moving slightly."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully right along the same natural arc until it restores the exact previously observed view of the standing table tent. Match the earlier framing, heading, perspective, target identity and placement, scene geometry, lighting, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "revisit", "target_label": "a clear acrylic ring-bound table tent for 徳川家 和食の専門店, with a yellow B6 table mark, food photos, policy text, and two QR codes", "target_aliases": ["table tent", "menu stand", "promotional stand"], "references": [{"timestamp_seconds": 37.167, "frame_index": null, "bbox_xyxy_normalized": [0.28125, 0.003703703703703704, 0.746875, 0.9851851851851852]}]}
+{"type": "real", "task_id": "real_003_reappear_01", "scene": "Lounge", "video": "videos/real/real_003.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in an S-LAB lounge facing four black kiosks with S-LAB lettering, yellow and grey bucket chairs, and low hexagonal tables. Patterned grey-and-red carpet covers the floor. The view stays still except for mild handheld sway. Kiosk screens and ceiling-light reflections keep shifting slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view of the same S-LAB lounge, kiosks, and chairs. The view stays still except for mild handheld sway. Screen content and carpet lighting continue."}, {"clip_id": "03", "clip_prompt": "A hand brings a small square book into clear view in front of the S-LAB kiosks, holds the cover toward the camera, then takes the book out of view. The view stays on the lounge and kiosks."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the kiosk view until a round white table and two lounge chairs fill the near view. After holding that view, the viewpoint turns back to the opening kiosk view."}, {"clip_id": "05", "clip_prompt": "A hand brings a small square book into clear view again in front of the S-LAB kiosks, holds it in the foreground, then takes the book out of view. The view stays on the lounge and kiosks."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same S-LAB lounge, kiosks, and chairs. The view stays still except for mild handheld sway. Kiosk screens and room reflections continue. This quiet tail is shorter than ten seconds because the slowed source ends at 56.77s."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical book from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the book. The action is explicit and continuous: the same hand naturally brings the same small square book back into clear view and holds the cover toward the camera. Preserve the book's exact instance identity, square-cover geometry, dimensions, proportions, cover artwork layout, title block, border and spine, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "reappear", "target_label": "a small square red-bordered book titled AN ESSENTIAL GUIDE TO SINGLISH, with a Miel beach cartoon, speech bubbles, and a yellow copies-sold badge", "target_aliases": ["book", "Singlish guide"], "references": [{"timestamp_seconds": 24.496, "frame_index": null, "bbox_xyxy_normalized": [0.28854166666666664, 0.04814814814814815, 0.7364583333333333, 0.8833333333333333]}]}
+{"type": "real", "task_id": "real_003_reappear_02", "scene": "Lounge", "video": "videos/real/real_003.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in an S-LAB lounge facing four black kiosks with S-LAB lettering, yellow and grey bucket chairs, and low hexagonal tables. Patterned grey-and-red carpet covers the floor. The view stays still except for mild handheld sway. Kiosk screens and ceiling-light reflections keep shifting slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view of the same S-LAB lounge, kiosks, and chairs. The view stays still except for mild handheld sway. Screen content and carpet lighting continue."}, {"clip_id": "03", "clip_prompt": "A hand brings a small square book into clear view in front of the S-LAB kiosks, holds the cover toward the camera, then takes the book out of view. The view stays on the lounge and kiosks."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the kiosk view until a round white table and two lounge chairs fill the near view. After holding that view, the viewpoint turns back to the opening kiosk view."}, {"clip_id": "05", "clip_prompt": "A hand brings a small square book into clear view again in front of the S-LAB kiosks, holds it in the foreground, then takes the book out of view. The view stays on the lounge and kiosks."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same S-LAB lounge, kiosks, and chairs. The view stays still except for mild handheld sway. Kiosk screens and room reflections continue. This quiet tail is shorter than ten seconds because the slowed source ends at 56.77s."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical book from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the book. The action is explicit and continuous: the same hand naturally brings the same small square book back into clear view in front of the lounge. Preserve the book's exact instance identity, square-cover geometry, dimensions, proportions, cover artwork layout, title block, border and spine, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration. Do not invent a second different book.", "task_type": "reappear", "target_label": "the same small square red-bordered book titled AN ESSENTIAL GUIDE TO SINGLISH, with a Miel beach cartoon, speech bubbles, and a yellow copies-sold badge", "target_aliases": ["book", "Singlish guide"], "references": [{"timestamp_seconds": 48.73, "frame_index": null, "bbox_xyxy_normalized": [0.27708333333333335, 0.12037037037037036, 0.7677083333333333, 1.0]}]}
+{"type": "real", "task_id": "real_003_revisit_01", "scene": "Lounge", "video": "videos/real/real_003.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in an S-LAB lounge facing four black kiosks with S-LAB lettering, yellow and grey bucket chairs, and low hexagonal tables. Patterned grey-and-red carpet covers the floor. The view stays still except for mild handheld sway. Kiosk screens and ceiling-light reflections keep shifting slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view of the same S-LAB lounge, kiosks, and chairs. The view stays still except for mild handheld sway. Screen content and carpet lighting continue."}, {"clip_id": "03", "clip_prompt": "A hand brings a small square book into clear view in front of the S-LAB kiosks, holds the cover toward the camera, then takes the book out of view. The view stays on the lounge and kiosks."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the kiosk view until a round white table and two lounge chairs fill the near view. After holding that view, the viewpoint turns back to the opening kiosk view."}, {"clip_id": "05", "clip_prompt": "A hand brings a small square book into clear view again in front of the S-LAB kiosks, holds it in the foreground, then takes the book out of view. The view stays on the lounge and kiosks."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same S-LAB lounge, kiosks, and chairs. The view stays still except for mild handheld sway. Kiosk screens and room reflections continue. This quiet tail is shorter than ten seconds because the slowed source ends at 56.77s."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left along the same natural arc until it restores the exact previously observed view of the table and chairs. Match the earlier framing, heading, perspective, target identity and placement, scene geometry, lighting, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "revisit", "target_label": "a small round white pedestal table with a potted green plant, flanked by two dark-shell lounge chairs with orange-yellow interiors, set on patterned carpet beside an S-LAB glass wall", "target_aliases": ["table and chairs", "lounge seating", "round table"], "references": [{"timestamp_seconds": 34.615, "frame_index": null, "bbox_xyxy_normalized": [0.18958333333333333, 0.2518518518518518, 0.709375, 0.8]}]}
+{"type": "real", "task_id": "real_004_reappear_01", "scene": "Covered Walkway", "video": "videos/real/real_004.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view walking slowly forward along a covered outdoor walkway. Ferns line the left planter. A white wall, beige trash can, and elevator edge sit on the right. The walk stays slow and one-way. Sunlit ferns and floor shadows keep moving slightly."}, {"clip_id": "02", "clip_prompt": "The same first-person walk continues slowly forward along the covered walkway. Ferns stay on the left and the white wall stays on the right. A red fire extinguisher becomes clearer ahead. The walk stays slow and one-way."}, {"clip_id": "03", "clip_prompt": "The viewpoint turns right-rear from the walkway until several green recycling bins fill the near view beside the elevator wall. After holding that view, the viewpoint returns toward the walkway and elevator."}, {"clip_id": "04", "clip_prompt": "The same first-person walk continues slowly forward along the covered walkway. Ferns stay on the left. A red fire extinguisher stays on the right wall. The walk stays slow and one-way."}, {"clip_id": "05", "clip_prompt": "A hand brings a card into clear view in the lower foreground, holds it toward the camera, then puts the card back out of view. The walkway, ferns, and fire extinguisher stay behind the hand."}, {"clip_id": "06", "clip_prompt": "The same first-person walk continues slowly forward along the covered walkway toward the darker far opening. Ferns stay on the left and the white wall stays on the right. The walk stays slow and one-way."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical flat rectangular card from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the card. The action is explicit and continuous: the same hand naturally brings the same flat rectangular card back into clear view in the lower foreground. Preserve the card's exact instance identity, rectangular card geometry, dimensions, proportions, corner radius, printed logo area, printed lettering, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "reappear", "target_label": "a white rectangular access card with a blue-green curved logo, a small teal circle, thin printed lettering, and a small red square mark", "target_aliases": ["card", "access card", "keycard"], "references": [{"timestamp_seconds": 47.637, "frame_index": null, "bbox_xyxy_normalized": [0.2916666666666667, 0.4759259259259259, 0.60625, 0.8333333333333334]}]}
+{"type": "real", "task_id": "real_005_reappear_01", "scene": "Home Office", "video": "videos/real/real_005.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a white desk facing an open dark laptop, a white digital clock, tangled cables, and a small panda figure. The laptop shows a search page. The view stays still except for mild handheld sway. Screen content and desk reflections keep shifting slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view of the same desk, open laptop, and clock. The view stays still except for mild handheld sway. The screen and clock digits continue."}, {"clip_id": "03", "clip_prompt": "A hand brings a small toy into clear view in front of the laptop, holds it in the foreground, then takes the toy out of view. The view stays on the desk and laptop."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the desk view until a suitcase on the floor fills the near view beside a black bag and boxes. After holding that view, the viewpoint turns back to the opening desk view."}, {"clip_id": "05", "clip_prompt": "A hand brings a snack packet into clear view in front of the laptop, holds it toward the camera, then takes the snack packet out of view. The view stays on the desk and laptop."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same white desk, open laptop, and clock. The view stays still except for mild handheld sway. Screen glow and desk reflections continue."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical small figurine toy on its round base from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the figurine toy. The action is explicit and continuous: the same hand naturally brings the same figurine toy back into clear view in front of the desk. Preserve the figurine toy's exact instance identity, figurine-and-base geometry, dimensions, proportions, head and body shape, round base, base surface printing, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "reappear", "target_label": "a pink solar-powered lion bobblehead with a bright pink mane, a fluffy white body, a pink circular SING base, and a small solar panel on the base", "target_aliases": ["toy", "solar toy", "lion toy"], "references": [{"timestamp_seconds": 23.332, "frame_index": null, "bbox_xyxy_normalized": [0.421875, 0.19814814814814816, 0.6364583333333333, 0.8759259259259259]}]}
+{"type": "real", "task_id": "real_005_reappear_02", "scene": "Home Office", "video": "videos/real/real_005.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a white desk facing an open dark laptop, a white digital clock, tangled cables, and a small panda figure. The laptop shows a search page. The view stays still except for mild handheld sway. Screen content and desk reflections keep shifting slightly."}, {"clip_id": "02", "clip_prompt": "A first-person view of the same desk, open laptop, and clock. The view stays still except for mild handheld sway. The screen and clock digits continue."}, {"clip_id": "03", "clip_prompt": "A hand brings a small toy into clear view in front of the laptop, holds it in the foreground, then takes the toy out of view. The view stays on the desk and laptop."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the desk view until a suitcase on the floor fills the near view beside a black bag and boxes. After holding that view, the viewpoint turns back to the opening desk view."}, {"clip_id": "05", "clip_prompt": "A hand brings a snack packet into clear view in front of the laptop, holds it toward the camera, then takes the snack packet out of view. The view stays on the desk and laptop."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same white desk, open laptop, and clock. The view stays still except for mild handheld sway. Screen glow and desk reflections continue."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical snack packet from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the snack packet. The action is explicit and continuous: the same hand naturally brings the same snack packet back into clear view in front of the laptop. Preserve the snack packet's exact instance identity, pouch geometry, dimensions, proportions, sealed edges, front printed layout, net-weight mark, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "reappear", "target_label": "a small square green-and-white 远方的梦想 每日坚果 packet labeled NUTS & DRIED FRUITS, with nut-and-fruit illustrations and a 25g net-weight mark", "target_aliases": ["snack packet", "nuts packet", "snack"], "references": [{"timestamp_seconds": 45.0, "frame_index": null, "bbox_xyxy_normalized": [0.309375, 0.18518518518518517, 0.6739583333333333, 0.7833333333333332]}]}
+{"type": "real", "task_id": "real_006_reappear_01", "scene": "Living Room", "video": "videos/real/real_006.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view in a living room facing several chairs on a polished wood floor: a floral armchair, a tall slatted wood lounge chair, a small white table, and a pale grey chair. Dark cabinets and storage shelves sit in the background. The view stays still except for mild handheld sway. Floor reflections and room light keep shifting slightly."}, {"clip_id": "02", "clip_prompt": "A hand brings a small handheld trash bin into clear view in the foreground, holds it in front of the chairs, then puts the trash bin back out of view. The view stays on the living room chairs and wood floor."}, {"clip_id": "03", "clip_prompt": "A first-person view of the same living room chairs, white table, and cabinets. The view stays still except for mild handheld sway. Floor reflections continue."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the chair view until a piece of furniture covered by a cloth fills the near view against the wall. After holding that view, the viewpoint turns back to the opening chair view."}, {"clip_id": "05", "clip_prompt": "A first-person view of the same living room chairs and polished wood floor. The view stays still except for mild handheld sway."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same living room chairs, table, and cabinets. The view stays still except for mild handheld sway. Floor reflections and room light continue."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical handheld trash bin from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the trash bin. The action is explicit and continuous: the same hand naturally brings the same handheld trash bin back into clear view in the foreground. Preserve the trash bin's exact instance identity, body-and-lid geometry, dimensions, proportions, side-panel surface pattern, lid opening, rim, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "reappear", "target_label": "a small light blue-grey plastic desktop trash bin with a rectangular ribbed body, rounded corners, and a domed swing-top lid", "target_aliases": ["trash bin", "desktop bin", "handheld trash can"], "references": [{"timestamp_seconds": 14.669, "frame_index": null, "bbox_xyxy_normalized": [0.271875, 0.07777777777777778, 0.6604166666666667, 1.0]}]}
+{"type": "real", "task_id": "real_007_reappear_01", "scene": "Bedroom", "video": "videos/real/real_007.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view facing a bed with stacked rust-orange bolsters, a purple floral pillow, a brown plush, and a light blue duvet against a plain wall. The view stays still except for mild handheld sway. Fabric folds and room light keep shifting slightly."}, {"clip_id": "02", "clip_prompt": "A hand brings a mug packaging box into clear view in front of the bed, holds the box toward the camera, then puts the box back out of view. The view stays on the bed and pillows."}, {"clip_id": "03", "clip_prompt": "A first-person view of the same bed, stacked bolsters, floral pillow, and blue duvet. The view stays still except for mild handheld sway."}, {"clip_id": "04", "clip_prompt": "The viewpoint turns right from the bed view until a bag sitting on a chair fills the near view. After holding that view, the viewpoint turns back to the opening bed view."}, {"clip_id": "05", "clip_prompt": "A first-person view of the same bed and pillows. The view stays still except for mild handheld sway. Duvet folds continue."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same bedroom bed, bolsters, and floral pillow. The view stays still except for mild handheld sway."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical mug packaging box from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the packaging box. The action is explicit and continuous: the same hand naturally brings the same mug packaging box back into clear view in front of the bed. Preserve the box's exact instance identity, rectangular-carton geometry, dimensions, proportions, panel edges, front printed layout, product photo area, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "reappear", "target_label": "a tall Zojirushi stainless-mug retail box showing a matte white mug photo, the elephant logo, Hot or Cold / STAINLESS MUG text, and a 0.36 liter mark", "target_aliases": ["mug box", "packaging box", "thermos box"], "references": [{"timestamp_seconds": 14.545, "frame_index": null, "bbox_xyxy_normalized": [0.3927083333333333, 0.040740740740740744, 0.6416666666666667, 0.9740740740740741]}]}
+{"type": "real", "task_id": "real_008_reappear_01", "scene": "Bar", "video": "videos/real/real_008.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a bar table facing a wide wood-plank surface. A person in a knit sweater sits ahead with a red game box on the table. Other guests and warm night lighting stay in the background. The view stays still except for mild handheld sway. Table reflections and background motion continue."}, {"clip_id": "02", "clip_prompt": "A first-person view of the same bar table, seated person, and game box. The view stays still except for mild handheld sway. Warm light and background guests keep moving slightly."}, {"clip_id": "03", "clip_prompt": "A hand brings a souvenir magnet into clear view above the wooden table, holds it toward the camera, then puts the magnet back out of view. The view stays on the bar table."}, {"clip_id": "04", "clip_prompt": "A first-person view of the same bar table and seated person. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns left from the bar-table view until a milk carton and cup fill the near view on the wooden table. After holding that view, the viewpoint turns back to the opening table view."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same bar table, wood grain, and background guests. The view stays still except for mild handheld sway. Warm lighting continues."}], "continue_prompt": "Continue the coherent first-person video from its final frame. Reproduce the exact same physical souvenir magnet from the preceding context. Treat the preceding video as the complete and authoritative visual reference for the magnet. The action is explicit and continuous: the same hand naturally brings the same souvenir magnet back into clear view above the table. Preserve the magnet's exact instance identity, framed-relief geometry, dimensions, proportions, raised border frame, relief scene layout, lettering band, color layout, materials, texture, markings, surface details, scale, orientation, motion, and hand interaction. Maintain the same scene, lighting, shadows, perspective, spatial layout, viewpoint behavior, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "reappear", "target_label": "a rectangular Copenhagen souvenir magnet in an ornate gold-brown frame, showing KØBENHAVN lettering, a red bicycle, the Little Mermaid, green domes, and Danish flags", "target_aliases": ["souvenir magnet", "magnet", "fridge magnet"], "references": [{"timestamp_seconds": 25.127, "frame_index": null, "bbox_xyxy_normalized": [0.275, 0.29074074074074074, 0.728125, 0.8981481481481481]}]}
+{"type": "real", "task_id": "real_008_revisit_01", "scene": "Bar", "video": "videos/real/real_008.mp4", "context_clip_prompts": [{"clip_id": "01", "clip_prompt": "A first-person view at a bar table facing a wide wood-plank surface. A person in a knit sweater sits ahead with a red game box on the table. Other guests and warm night lighting stay in the background. The view stays still except for mild handheld sway. Table reflections and background motion continue."}, {"clip_id": "02", "clip_prompt": "A first-person view of the same bar table, seated person, and game box. The view stays still except for mild handheld sway. Warm light and background guests keep moving slightly."}, {"clip_id": "03", "clip_prompt": "A hand brings a souvenir magnet into clear view above the wooden table, holds it toward the camera, then puts the magnet back out of view. The view stays on the bar table."}, {"clip_id": "04", "clip_prompt": "A first-person view of the same bar table and seated person. The view stays still except for mild handheld sway."}, {"clip_id": "05", "clip_prompt": "The viewpoint turns left from the bar-table view until a milk carton and cup fill the near view on the wooden table. After holding that view, the viewpoint turns back to the opening table view."}, {"clip_id": "06", "clip_prompt": "A first-person view of the same bar table, wood grain, and background guests. The view stays still except for mild handheld sway. Warm lighting continues."}], "continue_prompt": "Continue the same uninterrupted first-person video directly from its final frame. The viewpoint turns fully left along the same natural arc until it restores the exact previously observed view of the milk and cups. Match the earlier framing, heading, perspective, target identity and placement, scene geometry, lighting, and natural live-action visual style. Do not add any unrequested pan, yaw, pitch, roll, translation, zoom, cut, teleport, text, interface, panorama, or extra turn. Maintain continuous, physically plausible first-person motion with natural acceleration and deceleration.", "task_type": "revisit", "target_label": "an opened beige Naturmælk organic whole-milk carton with a cow-and-wreath label, standing beside a clear Tuborg plastic cup partly filled with white milk", "target_aliases": ["milk and cups", "milk carton", "cup"], "references": [{"timestamp_seconds": 44.0, "frame_index": null, "bbox_xyxy_normalized": [0.28125, 0.0, 0.734375, 0.9703703703703703]}]}