TwitterHawk: A Feature Bucket Based Approach to Sentiment Analysis William Boag author Peter Potash author Anna Rumshisky 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 boag-etal-2015-twitterhawk 10.18653/v1/S15-2107 https://aclanthology.org/S15-2107/ 2015-06 640 646