A survey on the role of negation in sentiment analysis Michael Wiegand author Alexandra Balahur author Benjamin Roth author Dietrich Klakow author Andrés Montoyo author 2010-07 text Proceedings of the Workshop on Negation and Speculation in Natural Language Processing Roser Morante editor Caroline Sporleder editor University of Antwerp Uppsala, Sweden conference publication wiegand-etal-2010-survey https://aclanthology.org/W10-3111/ 2010-07 60 68