SgSum:Transforming Multi-document Summarization into Sub-graph Selection Moye Chen author Wei Li author Jiachen Liu author Xinyan Xiao author Hua Wu author Haifeng Wang 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 chen-etal-2021-sgsum 10.18653/v1/2021.emnlp-main.333 https://aclanthology.org/2021.emnlp-main.333/ 2021-11 4063 4074