Sparse and Constrained Attention for Neural Machine Translation Chaitanya Malaviya author Pedro Ferreira author André F T Martins author 2018-07 text Proceedings of the 56th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers) Iryna Gurevych editor Yusuke Miyao editor Association for Computational Linguistics Melbourne, Australia conference publication malaviya-etal-2018-sparse 10.18653/v1/P18-2059 https://aclanthology.org/P18-2059/ 2018-07 370 376