# Where the model shines — hard cases handled well

Difficult inputs this general-purpose model gets **right**. All inputs are
synthetic (fictional names); outputs are the model's **actual** predictions
(quantized ONNX, recall-first PER threshold 0.2). Reproduce with
[`strong_cases.py`](strong_cases.py).

## Polish inflection (declension)

Polish surnames change form by grammatical case; the model tags the full inflected
surface, not just the nominative:

| Input | Case | Model |
|---|---|---|
| `Pozew skierowano przeciwko Jerzemu Sekule.` | dative | `PER 'Jerzemu Sekule'` |
| `Sprawa dotyczy akt Wojciecha Michalika.` | genitive | `PER 'Wojciecha Michalika'` |

## Tricky surface forms

| Input | Why it's hard | Model |
|---|---|---|
| `Powódka Anna Nowak-Kowalska złożyła wniosek.` | hyphenated double surname → one span | `PER 'Anna Nowak-Kowalska'` |
| `Stawiła się ALEKSANDRA ŚWIDERSKA, pełnomocnik.` | ALL-CAPS header/signature style | `PER 'ALEKSANDRA ŚWIDERSKA'` |
| `Z poważaniem,` / `Iga Mełech` / `radca prawny` | short female first + rare surname in a low-cue signature | `PER 'Iga Mełech'` |

## Mild / moderate OCR noise

Light scan corruption (missing diacritics, a few confusable characters) is still
handled:

| Input | Behind the garble | Model |
|---|---|---|
| `Pozwany Damian Zotadek wniósł odpowiedź na pozew.` | *Damian Żołądek* (lost diacritics) | `PER 'Damian Zotadek'` |
| `Z powództwa Jiga Bękowiki przeciwko spółce.` | *Jaga Bętkowski* | `PER 'Jiga Bękowiki'` |
| `Pełnomocnik: Ptek Gostoiski, adwokat.` | *Patryk Gostomski* | `PER 'Ptek Gostoiski'` |

> **Heavy** OCR garble is this variant's weak spot — see
> [`KNOWN_LIMITATIONS.md`](KNOWN_LIMITATIONS.md). For scanned documents prefer the
> [OCR-robust variant](https://huggingface.co/lexedit/herbert-polish-legal-ner-ocr).

## Multiple types + public/private distinction

```
Jan Kowalski, zam. ul. Słoneczna 5 w Krakowie, PESEL 02070803628.
   PER      'Jan Kowalski'
   LOC      'ul. Słoneczna 5'      ← private address (masked)
   LOC_PUB  'Krakowie'             ← public city (kept by default)
   ID       '02070803628'          ← national id (PESEL)
```

The model keeps the public place (`Krakowie`) visible while masking the private
street address — so the legal context survives anonymisation.