Context Gates for Neural Machine Translation Zhaopeng Tu author Yang Liu author Zhengdong Lu author Xiaohua Liu author Hang Li author 2017 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal tu-etal-2017-context 10.1162/tacl_a_00048 https://aclanthology.org/Q17-1007/ 2017 5 87 99