Coreference for Learning to Extract Relations: Yes Virginia, Coreference Matters Ryan Gabbard author Marjorie Freedman author Ralph Weischedel author 2011-06 text Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies Dekang Lin editor Yuji Matsumoto editor Rada Mihalcea editor Association for Computational Linguistics Portland, Oregon, USA conference publication gabbard-etal-2011-coreference https://aclanthology.org/P11-2050/ 2011-06 288 293