A Sentimental Education: Sentiment Analysis Using Subjectivity Summarization Based on Minimum Cuts Bo Pang author Lillian Lee author 2004-07 text Proceedings of the 42nd Annual Meeting of the Association for Computational Linguistics (ACL-04) Barcelona, Spain conference publication pang-lee-2004-sentimental 10.3115/1218955.1218990 https://aclanthology.org/P04-1035/ 2004-07 271 278