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README.md
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---
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language:
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- multilingual
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license: mit
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library_name: sentence-transformers
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tags:
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- claim2vec
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- embedding-model
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- fact-checking
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- claim-clustering
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- semantic-search
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- misinformation
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- contrastive-learning
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- multilingual-nlp
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---
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# π§ Claim2Vec
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**Claim2Vec** is a multilingual embedding model designed specifically for **fact-checked claim representation and clustering** in misinformation detection systems.
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It learns a semantic embedding space where recurrent and semantically equivalent claims are mapped close together, enabling improved grouping and retrieval of fact-checkable information across languages.
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---
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## π― Motivation
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Recurrent claims are a major challenge for automated fact-checking systems, especially in multilingual environments. While existing approaches focus on pairwise claim matching, they often fail to capture global structures of semantically equivalent claims.
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Claim2Vec addresses this gap by learning embeddings optimized for **claim clustering**, enabling better organization of repeated misinformation narratives across datasets and languages.
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---
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## π Key Features
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- π Multilingual claim representation
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- π Optimized for claim clustering tasks
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- π§ Contrastive learning with semantically similar claim pairs
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- π Improved embedding geometry for cluster separation
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- π Strong cross-lingual knowledge transfer
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- β‘ Designed for scalable fact-checking pipelines
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---
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## π§ͺ Training Objective
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Claim2Vec is trained using contrastive learning, encouraging semantically similar claims to have closer embeddings while pushing unrelated claims apart.
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---
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## π Experimental Results
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Evaluation across:
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- 3 benchmark datasets
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- 14 embedding baselines
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- 7 clustering algorithms
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shows that Claim2Vec consistently improves:
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- Cluster label alignment
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- Embedding space structure
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- Robustness across clustering configurations
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---
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## π Multilingual Performance
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Claim2Vec demonstrates strong performance in multilingual settings, where clusters containing multiple languages benefit significantly from fine-tuning, indicating effective cross-lingual semantic transfer.
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---
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## π‘ Use Cases
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- Fact-checking systems
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- Misinformation detection pipelines
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- Claim deduplication
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- Evidence grouping for RAG systems
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- News verification tools
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- Cross-lingual semantic clustering
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---
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## 𧬠Usage
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```python
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from sentence_transformers import SentenceTransformer
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model = SentenceTransformer("your-username/claim2vec")
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claims = [
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"COVID vaccines cause infertility",
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"Studies show no link between COVID vaccines and infertility"
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]
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embeddings = model.encode(claims)
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print(embeddings.shape)
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```
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## π Citation
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If you use Claim2Vec in your work, please cite:
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```bibtex
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@misc{claim2vec2026,
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title={Claim2Vec: Embedding Fact-Check Claims for Multilingual Similarity and Clustering},
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author={Panchendrarajan, Rrubaa and Zubiaga, Arkaitz},
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year={2026},
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eprint={2604.09812},
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archivePrefix={arXiv},
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primaryClass={cs.CL},
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url={https://arxiv.org/abs/2604.09812}
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}
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```
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π arXiv: https://arxiv.org/abs/2604.09812
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---
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language:
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+
- multilingual
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+
license: mit
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+
library_name: sentence-transformers
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+
tags:
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+
- claim2vec
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+
- embedding-model
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| 9 |
+
- fact-checking
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| 10 |
+
- claim-clustering
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| 11 |
+
- semantic-search
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| 12 |
+
- misinformation
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+
- contrastive-learning
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| 14 |
+
- multilingual-nlp
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| 15 |
+
---
|
| 16 |
+
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+
# π§ Claim2Vec
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+
|
| 19 |
+
**Claim2Vec** is a multilingual embedding model designed specifically for **fact-checked claim representation and clustering** in misinformation detection systems.
|
| 20 |
+
|
| 21 |
+
It learns a semantic embedding space where recurrent and semantically equivalent claims are mapped close together, enabling improved grouping and retrieval of fact-checkable information across languages.
|
| 22 |
+
|
| 23 |
+
---
|
| 24 |
+
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+
## π― Motivation
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+
|
| 27 |
+
Recurrent claims are a major challenge for automated fact-checking systems, especially in multilingual environments. While existing approaches focus on pairwise claim matching, they often fail to capture global structures of semantically equivalent claims.
|
| 28 |
+
|
| 29 |
+
Claim2Vec addresses this gap by learning embeddings optimized for **claim clustering**, enabling better organization of repeated misinformation narratives across datasets and languages.
|
| 30 |
+
|
| 31 |
+
---
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+
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+
## π Key Features
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+
|
| 35 |
+
- π Multilingual claim representation
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| 36 |
+
- π Optimized for claim clustering tasks
|
| 37 |
+
- π§ Contrastive learning with semantically similar claim pairs
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| 38 |
+
- π Improved embedding geometry for cluster separation
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| 39 |
+
- π Strong cross-lingual knowledge transfer
|
| 40 |
+
- β‘ Designed for scalable fact-checking pipelines
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| 41 |
+
|
| 42 |
+
---
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| 43 |
+
|
| 44 |
+
## π§ͺ Training Objective
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| 45 |
+
|
| 46 |
+
Claim2Vec is trained using contrastive learning, encouraging semantically similar claims to have closer embeddings while pushing unrelated claims apart.
|
| 47 |
+
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+
---
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+
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+
## π Experimental Results
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+
|
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+
Evaluation across:
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+
- 3 benchmark datasets
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| 54 |
+
- 14 embedding baselines
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| 55 |
+
- 7 clustering algorithms
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| 56 |
+
|
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+
shows that Claim2Vec consistently improves:
|
| 58 |
+
- Cluster label alignment
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| 59 |
+
- Embedding space structure
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| 60 |
+
- Robustness across clustering configurations
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+
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+
---
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+
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## π Multilingual Performance
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+
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Claim2Vec demonstrates strong performance in multilingual settings, where clusters containing multiple languages benefit significantly from fine-tuning, indicating effective cross-lingual semantic transfer.
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+
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+
---
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+
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## π‘ Use Cases
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+
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+
- Fact-checking systems
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+
- Misinformation detection pipelines
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| 74 |
+
- Claim deduplication
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| 75 |
+
- Evidence grouping for RAG systems
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| 76 |
+
- News verification tools
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| 77 |
+
- Cross-lingual semantic clustering
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+
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+
---
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+
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## 𧬠Usage
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+
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```python
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from sentence_transformers import SentenceTransformer
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+
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+
model = SentenceTransformer("your-username/claim2vec")
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+
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+
claims = [
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"COVID vaccines cause infertility",
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+
"Studies show no link between COVID vaccines and infertility"
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]
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+
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embeddings = model.encode(claims)
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print(embeddings.shape)
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```
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## π Citation
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+
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+
If you use Claim2Vec in your work, please cite:
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+
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+
```bibtex
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+
@misc{claim2vec2026,
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+
title={Claim2Vec: Embedding Fact-Check Claims for Multilingual Similarity and Clustering},
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author={Panchendrarajan, Rrubaa and Zubiaga, Arkaitz},
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year={2026},
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eprint={2604.09812},
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archivePrefix={arXiv},
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primaryClass={cs.CL},
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url={https://arxiv.org/abs/2604.09812}
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}
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```
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π arXiv: https://arxiv.org/abs/2604.09812
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