@inproceedings{Riloff:2003:EMNLP,
  author = {Riloff, Ellen  and  Wiebe, Janyce},
  title  = {Learning Extraction Patterns for Subjective Expressions},
  booktitle = {Proceedings of the 2003 Conference on Empirical Methods in Natural Language Processing},
  editor = {Michael Collins and Mark Steedman},
  url    = {http://www.aclweb.org/anthology/W03-1014.pdf},
  year   = 2003,
  pages  = {105--112}
}