Abstractive Unsupervised Multi-Document Summarization using Paraphrastic Sentence Fusion Mir Tafseer Nayeem author Tanvir Ahmed Fuad author Yllias Chali author 2018-08 text Proceedings of the 27th International Conference on Computational Linguistics Emily M Bender editor Leon Derczynski editor Pierre Isabelle editor Association for Computational Linguistics Santa Fe, New Mexico, USA conference publication nayeem-etal-2018-abstractive https://aclanthology.org/C18-1102/ 2018-08 1191 1204