Improving Feature-Based Biomedical Event Extraction System by Integrating Argument Information Lishuang Li author Yiwen Wang author Degen Huang author 2013-08 text Proceedings of the BioNLP Shared Task 2013 Workshop Claire Nédellec editor Robert Bossy editor Jin-Dong Kim editor Jung-jae Kim editor Tomoko Ohta editor Sampo Pyysalo editor Pierre Zweigenbaum editor Association for Computational Linguistics Sofia, Bulgaria conference publication li-etal-2013-improving https://aclanthology.org/W13-2015/ 2013-08 109 115