Duplicate from Wenyan0110/MMM-Fact

Co-authored-by: Xu <Wenyan0110@users.noreply.huggingface.co>

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README.md

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+# MMM-Fact: A Multimodal, Multi-Domain Fact-Checking Dataset with Multi-Level Retrieval Difficulty
+
+## Overview
+MMM-Fact is a real-world, multimodal benchmark for fact checking spanning 1995–2025. Each claim is paired with the full fact-check article and cross-modal evidence (text, images, videos, tables) to evaluate multi-step, cross-modal retrieval and reasoning.
+
+## Scale & Coverage
+| Item | Details |
+|---|---|
+| Instances | **125,449** fact-checked claims |
+| Time range | **1995–2025** |
+| Sources | **4** fact-checking sites + **1** news outlet *(each sample includes the complete fact-check article and associated evidence)* |
+
+## Annotations & Tasks
+- **Veracity labels:** True / False / Not Enough Information  
+- **Supported tasks:**  
+  - Veracity prediction  
+  - Explainable fact-checking  
+  - Complex evidence aggregation  
+  - Longitudinal analysis  
+
+## Retrieval-Difficulty Tiers
+To reflect verification effort, each sample is tagged with a retrieval difficulty based on the number of retrievable evidence sources:
+
+| Tier | Evidence Sources |
+|---|---|
+| **Basic** | 1–5 sources |
+| **Intermediate** | 6–10 sources |
+| **Advanced** | >10 sources |
+
+## Citation
+If you find this dataset useful, please cite:
+
+@article{xu2025mmm,
+  title={MMM-Fact: A Multimodal, Multi-Domain Fact-Checking Dataset with Multi-Level Retrieval Difficulty},
+  author={Xu, Wenyan and Xiang, Dawei and Ding, Tianqi and Lu, Weihai},
+  journal={arXiv preprint arXiv:2510.25120},
+  year={2025}
+}

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