Subtree Extractive Summarization via Submodular Maximization Hajime Morita author Ryohei Sasano author Hiroya Takamura author Manabu Okumura author 2013-08 text Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Hinrich Schuetze editor Pascale Fung editor Massimo Poesio editor Association for Computational Linguistics Sofia, Bulgaria conference publication morita-etal-2013-subtree https://aclanthology.org/P13-1101/ 2013-08 1023 1032