Abstractive Multi-document Summarization with Semantic Information Extraction Wei Li 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-2015-abstractive 10.18653/v1/D15-1219 https://aclanthology.org/D15-1219/ 2015-09 1908 1913