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e4e6b3b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | # MMM-Fact: A Multimodal, Multi-Domain Fact-Checking Dataset
## 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: [https://arxiv.org/abs/2510.25120](https://arxiv.org/abs/2510.25120)
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