Overview of BioNLP’09 Shared Task on Event Extraction Jin-Dong Kim author Tomoko Ohta author Sampo Pyysalo author Yoshinobu Kano author Jun’ichi Tsujii 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 kim-etal-2009-overview https://aclanthology.org/W09-1401/ 2009-06 1 9