Utterance Rewriter
解决指代消解与信息省略问题
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Hui Su, Xiaoyu Shen, Rongzhi Zhang, Fei Sun, Pengwei Hu, Cheng Niu, and Jie Zhou. 2019. Improving Multi-turn Dialogue Modelling with Utterance ReWriter.arXiv preprint arXiv:1906.07004 (2019).
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Svitlana Vakulenko, Shayne Longpre, Zhucheng Tu, and Raviteja Anantha. 2020. Question Rewriting for Conversational Question Answering. ArXivabs/2004.14652 (2020).
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Ahmed Elgohary, Denis Peskov, and Jordan L. BoydGraber. 2019. Can you unpack that? learning to
rewrite questions-in-context. In EMNLP.
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Few-Shot Generative Conversational Query Rewriting
Pointer Networkers
问题形式化
训练样本：(H,Un−>R)
前n-1轮对话：H={U1,U2,...,UN−1}
第n轮话述，即要改写的话述：Un
改写以后的话述：R，如果不存在指代消解和实体省略情况，R就等同于Un，即负样本。
目标：学习映射函数p(R|(H,UN))，自动根据历史信息H重写Un。
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