Simple Coreference Resolution with Rich Syntactic and Semantic Features Aria Haghighi author Dan Klein author 2009-08 text Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing Philipp Koehn editor Rada Mihalcea editor Association for Computational Linguistics Singapore conference publication haghighi-klein-2009-simple https://aclanthology.org/D09-1120/ 2009-08 1152 1161