Single Document Summarization as Tree Induction Yang Liu author Ivan Titov author Mirella Lapata author 2019-06 text Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers) Jill Burstein editor Christy Doran editor Thamar Solorio editor Association for Computational Linguistics Minneapolis, Minnesota conference publication liu-etal-2019-single 10.18653/v1/N19-1173 https://aclanthology.org/N19-1173/ 2019-06 1745 1755