Webis: An Ensemble for Twitter Sentiment Detection Matthias Hagen author Martin Potthast author Michel Büchner author Benno Stein 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 hagen-etal-2015-webis 10.18653/v1/S15-2097 https://aclanthology.org/S15-2097/ 2015-06 582 589