Columbia NLP: Sentiment Detection of Subjective Phrases in Social Media Sara Rosenthal author Kathy McKeown author 2013-06 text Second Joint Conference on Lexical and Computational Semantics (*SEM), Volume 2: Proceedings of the Seventh International Workshop on Semantic Evaluation (SemEval 2013) Suresh Manandhar editor Deniz Yuret editor Association for Computational Linguistics Atlanta, Georgia, USA conference publication rosenthal-mckeown-2013-columbia https://aclanthology.org/S13-2079/ 2013-06 478 482