@inproceedings{somasundaran-etal-2008-discourse-level,
    title = "Discourse Level Opinion Relations: An Annotation Study",
    author = "Somasundaran, Swapna  and
      Ruppenhofer, Josef  and
      Wiebe, Janyce",
    editor = "Schlangen, David  and
      Hockey, Beth Ann",
    booktitle = "Proceedings of the 9th {SIG}dial Workshop on Discourse and Dialogue",
    month = jun,
    year = "2008",
    address = "Columbus, Ohio",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/W08-0122/",
    pages = "129--137"
}