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- W4221146543 abstract "Recent work has shown that an answer verification step introduced in Transformer-based answer selection models can significantly improve the state of the art in Question Answering. This step is performed by aggregating the embeddings of top $k$ answer candidates to support the verification of a target answer. Although the approach is intuitive and sound still shows two limitations: (i) the supporting candidates are ranked only according to the relevancy with the question and not with the answer, and (ii) the support provided by the other answer candidates is suboptimal as these are retrieved independently of the target answer. In this paper, we address both drawbacks by proposing (i) a double reranking model, which, for each target answer, selects the best support; and (ii) a second neural retrieval stage designed to encode question and answer pair as the query, which finds more specific verification information. The results on three well-known datasets for AS2 show consistent and significant improvement of the state of the art." @default.
- W4221146543 created "2022-04-03" @default.
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- W4221146543 date "2022-01-16" @default.
- W4221146543 modified "2023-09-29" @default.
- W4221146543 title "Double Retrieval and Ranking for Accurate Question Answering" @default.
- W4221146543 doi "https://doi.org/10.48550/arxiv.2201.05981" @default.
- W4221146543 hasPublicationYear "2022" @default.
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