@InProceedings{brown:2011:SS,
  author    = {Brown, Gregory},
  title     = {An Error Analysis of Relation Extraction in Social Media Documents},
  booktitle = {Proceedings of the ACL 2011 Student Session},
  month     = {June},
  year      = {2011},
  address   = {Portland, OR, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {64--68},
  url       = {http://www.aclweb.org/anthology/P11-3012}
}