On the Difficulty of Clustering Microblog Texts for Online Reputation Management Fernando Perez-Tellez author David Pinto author John Cardiff author Paolo Rosso author 2011-06 text Proceedings of the 2nd Workshop on Computational Approaches to Subjectivity and Sentiment Analysis (WASSA 2.011) Alexandra Balahur editor Ester Boldrini editor Andres Montoyo editor Patricio Martinez-Barco editor Association for Computational Linguistics Portland, Oregon conference publication perez-tellez-etal-2011-difficulty https://aclanthology.org/W11-1719/ 2011-06 146 152