@InProceedings{somasundaran-ruppenhofer-wiebe:2008:SIGDIAL,
  author    = {Somasundaran, Swapna  and  Ruppenhofer, Josef  and  Wiebe, Janyce},
  title     = {Discourse Level Opinion Relations: An Annotation Study},
  booktitle = {Proceedings of the 9th SIGdial Workshop on Discourse and Dialogue},
  month     = {June},
  year      = {2008},
  address   = {Columbus, Ohio},
  publisher = {Association for Computational Linguistics},
  pages     = {129--137},
  url       = {http://www.aclweb.org/anthology/W/W08/W08-0122}
}