PNR2: Ranking Sentences with Positive and Negative Reinforcement for Query-Oriented Update Summarization Wenjie Li author Furu Wei author Qin Lu author Yanxiang He author 2008-08 text Proceedings of the 22nd International Conference on Computational Linguistics (Coling 2008) Donia Scott editor Hans Uszkoreit editor Coling 2008 Organizing Committee Manchester, UK conference publication li-etal-2008-pnr2 https://aclanthology.org/C08-1062/ 2008-08 489 496