Learning Structures of Negations from Flat Annotations Vinodkumar Prabhakaran author Branimir Boguraev author 2015-06 text Proceedings of the Fourth Joint Conference on Lexical and Computational Semantics Martha Palmer editor Gemma Boleda editor Paolo Rosso editor Association for Computational Linguistics Denver, Colorado conference publication prabhakaran-boguraev-2015-learning 10.18653/v1/S15-1008 https://aclanthology.org/S15-1008/ 2015-06 71 81