Automatic extraction of contextual valence shifters. Noémi Boubel author Thomas François author Hubert Naets 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 boubel-etal-2013-automatic https://aclanthology.org/R13-1013/ 2013-09 98 104