Unsupervised Improving of Sentiment Analysis Using Global Target Context Tomáš Brychcín author Ivan Habernal author 2013-09 text Proceedings of the International Conference Recent Advances in Natural Language Processing RANLP 2013 Ruslan Mitkov editor Galia Angelova editor Kalina Bontcheva editor INCOMA Ltd. Shoumen, BULGARIA Hissar, Bulgaria conference publication brychcin-habernal-2013-unsupervised https://aclanthology.org/R13-1016/ 2013-09 122 128