UDLAP: Sentiment Analysis Using a Graph-Based Representation Esteban Castillo author Ofelia Cervantes author Darnes Vilariño author David Báez author Alfredo Sánchez 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 castillo-etal-2015-udlap 10.18653/v1/S15-2093 https://aclanthology.org/S15-2093/ 2015-06 556 560