High-precision biological event extraction with a concept recognizer K Bretonnel Cohen author Karin Verspoor author Helen Johnson author Chris Roeder author Philip Ogren author William Baumgartner author Elizabeth White author Lawrence Hunter author 2009-06 text Proceedings of the BioNLP 2009 Workshop Companion Volume for Shared Task Jun’ichi Tsujii editor Association for Computational Linguistics Boulder, Colorado conference publication cohen-etal-2009-high https://aclanthology.org/W09-1407/ 2009-06 50 58