Abstractive Summarization Guided by Latent Hierarchical Document Structure Yifu Qiu author Shay B Cohen author 2022-12 text Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing Yoav Goldberg editor Zornitsa Kozareva editor Yue Zhang editor Association for Computational Linguistics Abu Dhabi, United Arab Emirates conference publication qiu-cohen-2022-abstractive 10.18653/v1/2022.emnlp-main.355 https://aclanthology.org/2022.emnlp-main.355/ 2022-12 5303 5317