A Multi-Phase Approach to Biomedical Event Extraction Hyoung-Gyu Lee author Han-Cheol Cho author Min-Jeong Kim author Joo-Young Lee author Gumwon Hong author Hae-Chang Rim 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 lee-etal-2009-multi https://aclanthology.org/W09-1415/ 2009-06 107 110