Papers › Paragraph-based Transformer Pre-training for Multi-Sentence Inference

Paragraph-based Transformer Pre-training for Multi-Sentence Inference

2 May 2022NAACL 2022 7arXiv:2205.01228archive 2025-07-28

Luca Di Liello, Siddhant Garg, Luca Soldaini, Alessandro Moschitti

Inference tasks such as answer sentence selection (AS2) or fact verification are typically solved by fine-tuning transformer-based models as individual sentence-pair classifiers. Recent studies show that these tasks benefit from modeling dependencies across multiple candidate sentences jointly. In this paper, we first show that popular pre-trained transformers perform poorly when used for fine-tuning on multi-candidate inference tasks. We then propose a new pre-training objective that models the paragraph-level semantics across multiple input sentences. Our evaluation on three AS2 and one fact verification datasets demonstrates the superiority of our pre-training technique over the traditional ones for transformers used as joint models for multi-candidate inference tasks, as well as when used as cross-encoders for sentence-pair formulations of these tasks. Our code and pre-trained models are released at https://github.com/amazon-research/wqa-multi-sentence-inference .

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