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README.md

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+---
+license: cc-by-sa-4.0
+task_categories:
+  - multiple-choice
+  - question-answering
+language:
+  - ar
+  - bn
+  - de
+  - en
+  - es
+  - fr
+  - id
+  - ja
+  - pt
+  - ru
+  - sw
+  - zh
+configs:
+  - config_name: ar
+    data_files:
+      - split: train
+        path: data/ar/train.parquet
+      - split: validation
+        path: data/ar/validation.parquet
+      - split: test
+        path: data/ar/test.parquet
+  - config_name: bn
+    data_files:
+      - split: train
+        path: data/bn/train.parquet
+      - split: validation
+        path: data/bn/validation.parquet
+      - split: test
+        path: data/bn/test.parquet
+  - config_name: de
+    data_files:
+      - split: train
+        path: data/de/train.parquet
+      - split: validation
+        path: data/de/validation.parquet
+      - split: test
+        path: data/de/test.parquet
+  - config_name: en
+    data_files:
+      - split: train
+        path: data/en/train.parquet
+      - split: validation
+        path: data/en/validation.parquet
+      - split: test
+        path: data/en/test.parquet
+  - config_name: es
+    data_files:
+      - split: train
+        path: data/es/train.parquet
+      - split: validation
+        path: data/es/validation.parquet
+      - split: test
+        path: data/es/test.parquet
+  - config_name: fr
+    data_files:
+      - split: train
+        path: data/fr/train.parquet
+      - split: validation
+        path: data/fr/validation.parquet
+      - split: test
+        path: data/fr/test.parquet
+  - config_name: id
+    data_files:
+      - split: train
+        path: data/id/train.parquet
+      - split: validation
+        path: data/id/validation.parquet
+      - split: test
+        path: data/id/test.parquet
+  - config_name: ja
+    data_files:
+      - split: train
+        path: data/ja/train.parquet
+      - split: validation
+        path: data/ja/validation.parquet
+      - split: test
+        path: data/ja/test.parquet
+  - config_name: pt
+    data_files:
+      - split: train
+        path: data/pt/train.parquet
+      - split: validation
+        path: data/pt/validation.parquet
+      - split: test
+        path: data/pt/test.parquet
+  - config_name: ru
+    data_files:
+      - split: train
+        path: data/ru/train.parquet
+      - split: validation
+        path: data/ru/validation.parquet
+      - split: test
+        path: data/ru/test.parquet
+  - config_name: sw
+    data_files:
+      - split: train
+        path: data/sw/train.parquet
+      - split: validation
+        path: data/sw/validation.parquet
+      - split: test
+        path: data/sw/test.parquet
+  - config_name: zh
+    data_files:
+      - split: train
+        path: data/zh/train.parquet
+      - split: validation
+        path: data/zh/validation.parquet
+      - split: test
+        path: data/zh/test.parquet
+  - config_name: parallel
+    data_files:
+      - split: train
+        path: data/parallel/train.parquet
+      - split: validation
+        path: data/parallel/validation.parquet
+      - split: test
+        path: data/parallel/test.parquet
+---
+
+# PolyFact
+
+Parallel multilingual factual multiple-choice QA grounded in Wikidata. 100K facts × 12 languages, fully aligned by `fact_id` across all per-language configs.
+
+## Usage
+
+```python
+from datasets import load_dataset
+
+# One language at a time (SFT / eval)
+ds = load_dataset("jvonrad/PolyFact", "en")
+print(ds["train"][0])
+
+# All languages aligned per fact (cross-lingual training)
+par = load_dataset("jvonrad/PolyFact", "parallel")
+print(par["train"][0]["translations"]["en"])
+```
+
+## Schema
+
+**Per-language configs** (`ar`, `bn`, `de`, `en`, `es`, `fr`, `id`, `ja`, `pt`, `ru`, `sw`, `zh`) — flat, one row per (fact, language):
+
+| Column | Type | Description |
+|---|---|---|
+| `fact_id` | string | Shared across languages — `<subject_qid>\|<property_pid>\|<object_qid>` |
+| `language` | string | ISO language code |
+| `subject` | string | Subject entity label |
+| `subject_id` | string | Wikidata Q-id for subject |
+| `relation` | string | Relation name (e.g. `educated at`) |
+| `property_id` | string | Wikidata P-id for the relation |
+| `object` | string | Object entity label (the canonical answer) |
+| `object_id` | string | Wikidata Q-id for object |
+| `question` | string | Natural-language question in `language` |
+| `option_a`..`option_d` | string | Four multiple-choice options |
+| `answer_text` | string | The correct option as text (matches one of `option_a`..`option_d`) |
+| `answer_index` | int | 0-based index of the correct option |
+
+**`parallel` config** — one row per fact:
+
+| Column | Type | Description |
+|---|---|---|
+| `fact_id`, `subject`, `subject_id`, `relation`, `property_id`, `object`, `object_id` | — | Same as above |
+| `translations` | dict | `{lang_code: {question, option_a..d, answer_text, answer_index}}` |
+
+Splits are parallel across languages: every `fact_id` in a split is present in all per-language configs.

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