DIEGOLab: An Approach for Message-level Sentiment Classification in Twitter Abeed Sarker author Azadeh Nikfarjam author Davy Weissenbacher author Graciela Gonzalez 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 sarker-etal-2015-diegolab 10.18653/v1/S15-2085 https://aclanthology.org/S15-2085/ 2015-06 510 514