A Large-Scale Multi-Length Headline Corpus for Analyzing Length-Constrained Headline Generation Model Evaluation Yuta Hitomi author Yuya Taguchi author Hideaki Tamori author Ko Kikuta author Jiro Nishitoba author Naoaki Okazaki author Kentaro Inui author Manabu Okumura author 2019-oct–nov text Proceedings of the 12th International Conference on Natural Language Generation Kees van Deemter editor Chenghua Lin editor Hiroya Takamura editor Association for Computational Linguistics Tokyo, Japan conference publication hitomi-etal-2019-large 10.18653/v1/W19-8641 https://aclanthology.org/W19-8641/ 2019-oct–nov 333 343