@inproceedings{li-etal-2009-non,
    title = "A Non-negative Matrix Tri-factorization Approach to Sentiment Classification with Lexical Prior Knowledge",
    author = "Li, Tao  and
      Zhang, Yi  and
      Sindhwani, Vikas",
    editor = "Su, Keh-Yih  and
      Su, Jian  and
      Wiebe, Janyce  and
      Li, Haizhou",
    booktitle = "Proceedings of the Joint Conference of the 47th Annual Meeting of the {ACL} and the 4th International Joint Conference on Natural Language Processing of the {AFNLP}",
    month = aug,
    year = "2009",
    address = "Suntec, Singapore",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/P09-1028/",
    pages = "244--252"
}