Extracting Complex Biological Events with Rich Graph-Based Feature Sets Jari Björne author Juho Heimonen author Filip Ginter author Antti Airola author Tapio Pahikkala author Tapio Salakoski 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 bjorne-etal-2009-extracting https://aclanthology.org/W09-1402/ 2009-06 10 18