Distinguishing Historical from Current Problems in Clinical Reports – Which Textual Features Help? Danielle Mowery author Henk Harkema author John Dowling author Jonathan Lustgarten author Wendy Chapman 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 mowery-etal-2009-distinguishing https://aclanthology.org/W09-1302/ 2009-06 10 18