TWINA at SemEval-2017 Task 4: Twitter Sentiment Analysis with Ensemble Gradient Boost Tree Classifier Naveen Kumar Laskari author Suresh Kumar Sanampudi author 2017-08 text Proceedings of the 11th International Workshop on Semantic Evaluation (SemEval-2017) Steven Bethard editor Marine Carpuat editor Marianna Apidianaki editor Saif M Mohammad editor Daniel Cer editor David Jurgens editor Association for Computational Linguistics Vancouver, Canada conference publication laskari-sanampudi-2017-twina 10.18653/v1/S17-2109 https://aclanthology.org/S17-2109/ 2017-08 659 663