Add README card

README.md

@@ -1,11 +1,72 @@
 ---
+pretty_name: Wiki-CoE
+language:
+- en
 license: apache-2.0
+task_categories:
+- question-answering
+- visual-question-answering
+tags:
+- multimodal
+- visual-question-answering
+- chain-of-evidence
+- document-understanding
+- wiki
+size_categories:
+- 10K<n<100K
 ---
-数据集文件元信息以及数据文件，请浏览“数据集文件”页面获取。
 
-当前数据集卡片使用的是默认模版，数据集的贡献者未提供更加详细的数据集介绍，但是您可以通过如下GIT Clone命令，或者ModelScope SDK来下载数据集
+# Wiki-CoE
 
-#### 下载方法 
-:modelscope-code[]{type="sdk"}
-:modelscope-code[]{type="git"}
+Wiki-CoE is a multimodal question-answering dataset for evaluating whether a model can answer questions from visual evidence and produce an explicit chain of evidence. Each example pairs a natural-language question with one or more Wikipedia page screenshots and asks the model to return both the answer and the supporting evidence.
+
+The dataset is intended for research on visual reasoning, evidence localization, and chain-of-evidence style multimodal QA.
+
+## Dataset contents
+
+The main release is under `release_strict_chainsplit_20260428_1338/`:
+
+| File | Description |
+|---|---:|
+| `train.json` | training split, 35,210 examples |
+| `test.json` | test split, 35,208 examples |
+| `val_1000_seed42.json` | small validation subset, 1,000 examples |
+| `split_report.json` | high-level split statistics |
+| `val_1000_seed42_manifest.json` | validation subset indices |
+
+Each example contains:
+
+| Field | Description |
+|---|---|
+| `question` | input question |
+| `answer` | short answer |
+| `type` | reasoning type |
+| `num_hops` | number of evidence hops |
+| `evidence_chain` | ordered evidence screenshots, bounding boxes, and sub-questions |
+| `evidences` | supporting evidence metadata |
+
+## Screenshot archive
+
+The screenshot images are stored as a split archive under `release_assets/`.
+
+To reconstruct the image directory:
+
+```bash
+cat release_assets/screenshots_trimmed.tar.zst.part-* > screenshots_trimmed.tar.zst
+tar --use-compress-program=unzstd -xf screenshots_trimmed.tar.zst
+```
+
+This creates:
+
+```text
+screenshots_trimmed/
+```
+
+The archive contains 76,000 PNG screenshots. SHA256 checksums for the archive parts are provided in `release_assets/screenshots_trimmed.tar.zst.sha256`.
+
+## Related resources
+
+- Code: https://github.com/PeiYangLiu/CoE
+- Wiki-CoE model checkpoint: https://huggingface.co/PeiyangLiu/CoE-Wiki-CoE-8B
+- SlideVQA model checkpoint: https://huggingface.co/PeiyangLiu/CoE-SlideVQA-8B