From newspaper to microblogging: What does it take to find opinions? Wladimir Sidorenko author Jonathan Sonntag author Nina Krüger author Stefan Stieglitz author Manfred Stede author 2013-06 text Proceedings of the 4th Workshop on Computational Approaches to Subjectivity, Sentiment and Social Media Analysis Alexandra Balahur editor Erik van der Goot editor Andres Montoyo editor Association for Computational Linguistics Atlanta, Georgia conference publication sidorenko-etal-2013-newspaper https://aclanthology.org/W13-1611/ 2013-06 81 86