Using Hedges to Enhance a Disease Outbreak Report Text Mining System Mike Conway author Son Doan author Nigel Collier author 2009-06 text Proceedings of the BioNLP 2009 Workshop K Bretonnel Cohen editor Dina Demner-Fushman editor Sophia Ananiadou editor John Pestian editor Jun’ichi Tsujii editor Bonnie Webber editor Association for Computational Linguistics Boulder, Colorado conference publication conway-etal-2009-using https://aclanthology.org/W09-1318/ 2009-06 142 143