Using Content-level Structures for Summarizing Microblog Repost Trees Jing Li author Wei Gao author Zhongyu Wei author Baolin Peng author Kam-Fai Wong author 2015-09 text Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing Lluís Màrquez editor Chris Callison-Burch editor Jian Su editor Association for Computational Linguistics Lisbon, Portugal conference publication li-etal-2015-using 10.18653/v1/D15-1259 https://aclanthology.org/D15-1259/ 2015-09 2168 2178