Opinum: statistical sentiment analysis for opinion classification Boyan Bonev author Gema Ramírez-Sánchez author Sergio Ortiz Rojas author 2012-07 text Proceedings of the 3rd Workshop in Computational Approaches to Subjectivity and Sentiment Analysis Alexandra Balahur editor Andres Montoyo editor Patricio Martinez Barco editor Ester Boldrini editor Association for Computational Linguistics Jeju, Korea conference publication bonev-etal-2012-opinum https://aclanthology.org/W12-3706/ 2012-07 29 37