Use bed field in loader schema and examples

vlm_plant_sim.py

@@ -51,7 +51,7 @@ class VlmPlantSimDataset(datasets.GeneratorBasedBuilder):
             "source": Value("string"),
             "dap": Value("int32"),
             "plot": Value("int32"),
-            "tier": Value("int32"),
+            "bed": Value("int32"),
             "image_path": Value("string"),
             "annotation_path": Value("string"),
             "scene_json_path": Value("string"),
@@ -106,7 +106,7 @@ class VlmPlantSimDataset(datasets.GeneratorBasedBuilder):
                             "source": record.get("source", ""),
                             "dap": int(record.get("dap", 0)),
                             "plot": int(record.get("plot", 0)),
-                            "tier": int(record.get("tier", record.get("location", 0))),
+                            "bed": int(record.get("bed", record.get("tier", record.get("location", 0)))),
                             "image_path": record.get("image_path", ""),
                             "annotation_path": record.get("annotation_path", ""),
                             "scene_json_path": record.get("scene_json_path", ""),