Extending NegEx with Kernel Methods for Negation Detection in Clinical Text Chaitanya Shivade author Marie-Catherine de Marneffe author Eric Fosler-Lussier author Albert M Lai author 2015-06 text Proceedings of the Second Workshop on Extra-Propositional Aspects of Meaning in Computational Semantics (ExProM 2015) Eduardo Blanco editor Roser Morante editor Caroline Sporleder editor Association for Computational Linguistics Denver, Colorado conference publication shivade-etal-2015-extending 10.3115/v1/W15-1305 https://aclanthology.org/W15-1305/ 2015-06 41 46