SWATCS65: Sentiment Classification Using an Ensemble of Class Projects Richard Wicentowski author 2015-06 text Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015) Preslav Nakov editor Torsten Zesch editor Daniel Cer editor David Jurgens editor Association for Computational Linguistics Denver, Colorado conference publication wicentowski-2015-swatcs65 10.18653/v1/S15-2105 https://aclanthology.org/S15-2105/ 2015-06 631 635