Columbia NLP: Sentiment Detection of Sentences and Subjective Phrases in Social Media Sara Rosenthal author Kathy McKeown author Apoorv Agarwal author 2014-08 text Proceedings of the 8th International Workshop on Semantic Evaluation (SemEval 2014) Preslav Nakov editor Torsten Zesch editor Association for Computational Linguistics Dublin, Ireland conference publication rosenthal-etal-2014-columbia 10.3115/v1/S14-2031 https://aclanthology.org/S14-2031/ 2014-08 198 202