UT-DB: An Experimental Study on Sentiment Analysis in Twitter Zhemin Zhu author Djoerd Hiemstra author Peter Apers author Andreas Wombacher 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 zhu-etal-2013-ut https://aclanthology.org/S13-2063/ 2013-06 384 389