Clustering Semantic Spaces of Suicide Notes and Newsgroups Articles. Pawel Matykiewicz author Wlodzislaw Duch author John Pestian 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 matykiewicz-etal-2009-clustering https://aclanthology.org/W09-1323/ 2009-06 179 184