Multi-grained Evidence Inference for Multi-choice Reading Comprehension

• URL: http://arxiv.org/abs/2310.18070v1
• Date: Fri, 27 Oct 2023 11:36:18 GMT
• Title: Multi-grained Evidence Inference for Multi-choice Reading Comprehension
• Authors: Yilin Zhao, Hai Zhao and Sufeng Duan
• Abstract summary: Multi-choice Machine Reading (MRC) is a major and challenging task for machines to answer questions according to provided options. We propose a novel general-purpose model enhancement which integrates multi-grained evidence comprehensively, named Multi-grained evidence inferencer (Mugen) Mugen extracts three different granularities of evidence, and integrates evidence with the original passages, achieving significant and consistent performance improvement on four multi-choice MRC benchmarks.
• Score: 62.0773160298008
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Multi-choice Machine Reading Comprehension (MRC) is a major and challenging task for machines to answer questions according to provided options. Answers in multi-choice MRC cannot be directly extracted in the given passages, and essentially require machines capable of reasoning from accurate extracted evidence. However, the critical evidence may be as simple as just one word or phrase, while it is hidden in the given redundant, noisy passage with multiple linguistic hierarchies from phrase, fragment, sentence until the entire passage. We thus propose a novel general-purpose model enhancement which integrates multi-grained evidence comprehensively, named Multi-grained evidence inferencer (Mugen), to make up for the inability. Mugen extracts three different granularities of evidence: coarse-, middle- and fine-grained evidence, and integrates evidence with the original passages, achieving significant and consistent performance improvement on four multi-choice MRC benchmarks.

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