Open Domain Question Answering with A Unified Knowledge Interface Kaixin Ma author Hao Cheng author Xiaodong Liu author Eric Nyberg author Jianfeng Gao author 2022-05 text Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Smaranda Muresan editor Preslav Nakov editor Aline Villavicencio editor Association for Computational Linguistics Dublin, Ireland conference publication ma-etal-2022-open 10.18653/v1/2022.acl-long.113 https://aclanthology.org/2022.acl-long.113/ 2022-05 1605 1620