Coarse-grain Fine-grain Coattention Network for Multi-evidence Question Answering

ICLR 2019 Victor Zhong • Caiming Xiong • Nitish Shirish Keskar • Richard Socher

End-to-end neural models have made significant progress in question answering, however recent studies show that these models implicitly assume that the answer and evidence appear close together in a single document. In this work, we propose the Coarse-grain Fine-grain Coattention Network (CFC), a new question answering model that combines information from evidence across multiple documents. The CFC consists of a coarse-grain module that interprets documents with respect to the query then finds a relevant answer, and a fine-grain module which scores each candidate answer by comparing its occurrences across all of the documents with the query.

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Task Dataset Model Metric name Metric value Global rank Compare
Question Answering WikiHop CFC Test 70.6 # 1