Sparse Sequence-to-Sequence Models Ben Peters author Vlad Niculae author André F T Martins author 2019-07 text Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics Anna Korhonen editor David Traum editor Lluís Màrquez editor Association for Computational Linguistics Florence, Italy conference publication peters-etal-2019-sparse 10.18653/v1/P19-1146 https://aclanthology.org/P19-1146/ 2019-07 1504 1519