DocChat: An Information Retrieval Approach for Chatbot Engines Using Unstructured Documents Zhao Yan author Nan Duan author Junwei Bao author Peng Chen author Ming Zhou author Zhoujun Li author Jianshe Zhou author 2016-08 text Proceedings of the 54th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Katrin Erk editor Noah A Smith editor Association for Computational Linguistics Berlin, Germany conference publication yan-etal-2016-docchat 10.18653/v1/P16-1049 https://aclanthology.org/P16-1049/ 2016-08 516 525