ATLANTIS at SemEval-2025 Task 3: Detecting Hallucinated Text Spans in Question Answering
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908480968851456 |
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| author | Kobus, Catherine Lancelot, François Martin, Marion-Cécile Amer, Nawal Ould |
| author_facet | Kobus, Catherine Lancelot, François Martin, Marion-Cécile Amer, Nawal Ould |
| contents | This paper presents the contributions of the ATLANTIS team to SemEval-2025 Task 3, focusing on detecting hallucinated text spans in question answering systems. Large Language Models (LLMs) have significantly advanced Natural Language Generation (NLG) but remain susceptible to hallucinations, generating incorrect or misleading content. To address this, we explored methods both with and without external context, utilizing few-shot prompting with a LLM, token-level classification or LLM fine-tuned on synthetic data. Notably, our approaches achieved top rankings in Spanish and competitive placements in English and German. This work highlights the importance of integrating relevant context to mitigate hallucinations and demonstrate the potential of fine-tuned models and prompt engineering. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_05179 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | ATLANTIS at SemEval-2025 Task 3: Detecting Hallucinated Text Spans in Question Answering Kobus, Catherine Lancelot, François Martin, Marion-Cécile Amer, Nawal Ould Computation and Language This paper presents the contributions of the ATLANTIS team to SemEval-2025 Task 3, focusing on detecting hallucinated text spans in question answering systems. Large Language Models (LLMs) have significantly advanced Natural Language Generation (NLG) but remain susceptible to hallucinations, generating incorrect or misleading content. To address this, we explored methods both with and without external context, utilizing few-shot prompting with a LLM, token-level classification or LLM fine-tuned on synthetic data. Notably, our approaches achieved top rankings in Spanish and competitive placements in English and German. This work highlights the importance of integrating relevant context to mitigate hallucinations and demonstrate the potential of fine-tuned models and prompt engineering. |
| title | ATLANTIS at SemEval-2025 Task 3: Detecting Hallucinated Text Spans in Question Answering |
| topic | Computation and Language |
| url | https://arxiv.org/abs/2508.05179 |