Considering Nested Tree Structure in Sentence Extractive Summarization with Pre-trained Transformer Jingun Kwon author Naoki Kobayashi author Hidetaka Kamigaito author Manabu Okumura author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication kwon-etal-2021-considering 10.18653/v1/2021.emnlp-main.330 https://aclanthology.org/2021.emnlp-main.330/ 2021-11 4039 4044