@inproceedings{somasundaran-etal-2009-opinion,
    title = "Opinion Graphs for Polarity and Discourse Classification",
    author = "Somasundaran, Swapna  and
      Namata, Galileo  and
      Getoor, Lise  and
      Wiebe, Janyce",
    editor = "Choudhury, Monojit  and
      Hassan, Samer  and
      Mukherjee, Animesh  and
      Muresan, Smaranda",
    booktitle = "Proceedings of the 2009 Workshop on Graph-based Methods for Natural Language Processing ({T}ext{G}raphs-4)",
    month = aug,
    year = "2009",
    address = "Suntec, Singapore",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/W09-3210/",
    pages = "66--74"
}