@inproceedings{wang-liu-2011-cross,
    title = "A Cross-corpus Study of Unsupervised Subjectivity Identification based on Calibrated {EM}",
    author = "Wang, Dong  and
      Liu, Yang",
    editor = "Balahur, Alexandra  and
      Boldrini, Ester  and
      Montoyo, Andres  and
      Martinez-Barco, Patricio",
    booktitle = "Proceedings of the 2nd Workshop on Computational Approaches to Subjectivity and Sentiment Analysis ({WASSA} 2.011)",
    month = jun,
    year = "2011",
    address = "Portland, Oregon",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/W11-1721/",
    pages = "161--167"
}