How Grammatical is Character-level Neural Machine Translation? Assessing MT Quality with Contrastive Translation Pairs Rico Sennrich author 2017-04 text Proceedings of the 15th Conference of the European Chapter of the Association for Computational Linguistics: Volume 2, Short Papers Mirella Lapata editor Phil Blunsom editor Alexander Koller editor Association for Computational Linguistics Valencia, Spain conference publication sennrich-2017-grammatical https://aclanthology.org/E17-2060/ 2017-04 376 382