2018

FlowQA: Grasping Flow in History for Conversational Machine Comprehension

Huang, Hsin-Yuan, Choi, Eunsol, Yih, Wen-tau

Understand

Conversational machine comprehension requires the understanding of the conversation history, such as previous question/answer pairs, the document context, and the current question.

  • To enable traditional, single-turn models to encode the history comprehensively, we introduce Flow, a mechanism that can incorporate intermediate representations generated during the process of answering previous questions, through an alternating parallel processing structure.
  • Compared to approaches that concatenate previous questions/answers as input, Flow integrates the latent semantics of the conversation history more deeply.
  • Our model, FlowQA, shows superior performance on two recently proposed conversational challenges (+7.2% F1 on CoQA and +4.0% on QuAC).

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