@inproceedings{pang-etal-2002-thumbs,
    title = "Thumbs up? Sentiment Classification using Machine Learning Techniques",
    author = "Pang, Bo  and
      Lee, Lillian  and
      Vaithyanathan, Shivakumar",
    booktitle = "Proceedings of the 2002 Conference on Empirical Methods in Natural Language Processing ({EMNLP} 2002)",
    month = jul,
    year = "2002",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/W02-1011/",
    doi = "10.3115/1118693.1118704",
    pages = "79--86"
}