@InProceedings{castillo-EtAl:2015:SemEval,
  author    = {Castillo, Esteban  and  Cervantes, Ofelia  and  Vilari\~{n}o, Darnes  and  B\'{a}ez, David  and  S\'{a}nchez, Alfredo},
  title     = {UDLAP: Sentiment Analysis Using a Graph-Based Representation},
  booktitle = {Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015)},
  month     = {June},
  year      = {2015},
  address   = {Denver, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {556--560},
  url       = {http://www.aclweb.org/anthology/S15-2093}
}