Bidirectional Attention Flow for Machine Comprehension


Machine comprehension (MC), answering a query about a given context paragraph, requires modeling complex interactions between the context and the query. Recently, attention mechanisms have been successfully extended to MC. Typically these methods use attention to focus on a small portion of the context and summarize it with a fixed-size vector, couple attentions temporally, and/or often form a uni-directional attention. In this paper we introduce the Bi-Directional Attention Flow (BIDAF) network, a multi-stage hierarchical process that represents the context at different levels of granularity and uses bidirectional attention flow mechanism to obtain a query-aware context representation without early summarization. Our experimental evaluations show that our model achieves the state-of-the-art results in Stanford Question Answering Dataset (SQuAD) and CNN/DailyMail cloze test.

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@article{Seo2016BidirectionalAF, title={Bidirectional Attention Flow for Machine Comprehension}, author={Min Joon Seo and Aniruddha Kembhavi and Ali Farhadi and Hannaneh Hajishirzi}, journal={CoRR}, year={2016}, volume={abs/1611.01603} }