An Empirical Study on the Effect of Negation Words on Sentiment Xiaodan Zhu author Hongyu Guo author Saif Mohammad author Svetlana Kiritchenko author 2014-06 text Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Kristina Toutanova editor Hua Wu editor Association for Computational Linguistics Baltimore, Maryland conference publication zhu-etal-2014-empirical 10.3115/v1/P14-1029 https://aclanthology.org/P14-1029/ 2014-06 304 313