An extended dependency graph for relation extraction in biomedical texts Yifan Peng author Samir Gupta author Cathy H Wu author K Vijay-Shanker author 2015-07 text Proceedings of BioNLP 15 Kevin Bretonnel Cohen editor Dina Demner-Fushman editor Sophia Ananiadou editor Jun-ichi Tsujii editor Association for Computational Linguistics Beijing, China conference publication peng-etal-2015-extended 10.18653/v1/W15-3803 https://aclanthology.org/W15-3803/ 2015-07 21 30