Entity Extraction via Ensemble Semantics Marco Pennacchiotti author Patrick Pantel 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 pennacchiotti-pantel-2009-entity https://aclanthology.org/D09-1025/ 2009-08 238 247