Towards Context-Based Subjectivity Analysis Farah Benamara author Baptiste Chardon author Yannick Mathieu author Vladimir Popescu author 2011-11 text Proceedings of 5th International Joint Conference on Natural Language Processing Haifeng Wang editor David Yarowsky editor Asian Federation of Natural Language Processing Chiang Mai, Thailand conference publication benamara-etal-2011-towards https://aclanthology.org/I11-1132/ 2011-11 1180 1188