Sentence-Level Fluency Evaluation: References Help, But Can Be Spared! Katharina Kann author Sascha Rothe author Katja Filippova author 2018-10 text Proceedings of the 22nd Conference on Computational Natural Language Learning Anna Korhonen editor Ivan Titov editor Association for Computational Linguistics Brussels, Belgium conference publication kann-etal-2018-sentence 10.18653/v1/K18-1031 https://aclanthology.org/K18-1031/ 2018-10 313 323