@InProceedings{hagen-EtAl:2015:SemEval,
  author    = {Hagen, Matthias  and  Potthast, Martin  and  B\"{u}chner, Michel  and  Stein, Benno},
  title     = {Webis: An Ensemble for Twitter Sentiment Detection},
  booktitle = {Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015)},
  month     = {June},
  year      = {2015},
  address   = {Denver, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {582--589},
  url       = {http://www.aclweb.org/anthology/S15-2097}
}