NILC_USP: An Improved Hybrid System for Sentiment Analysis in Twitter Messages Pedro Balage Filho author Lucas Avanço author Thiago Pardo author Maria das Graças Volpe Nunes author 2014-08 text Proceedings of the 8th International Workshop on Semantic Evaluation (SemEval 2014) Preslav Nakov editor Torsten Zesch editor Association for Computational Linguistics Dublin, Ireland conference publication balage-filho-etal-2014-nilc 10.3115/v1/S14-2074 https://aclanthology.org/S14-2074/ 2014-08 428 432