Improving Neural Machine Translation by Incorporating Hierarchical Subword Features Makoto Morishita author Jun Suzuki author Masaaki Nagata author 2018-08 text Proceedings of the 27th International Conference on Computational Linguistics Emily M Bender editor Leon Derczynski editor Pierre Isabelle editor Association for Computational Linguistics Santa Fe, New Mexico, USA conference publication morishita-etal-2018-improving https://aclanthology.org/C18-1052/ 2018-08 618 629