High-precision Identification of Discourse New and Unique Noun Phrases Olga Uryupina author 2003-07 text The Companion Volume to the Proceedings of 41st Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Sapporo, Japan conference publication uryupina-2003-high 10.3115/1075178.1075189 https://aclanthology.org/P03-2012/ 2003-07 80 86