@InProceedings{xu-ritter-grishman:2013:BUCC,
  author    = {Xu, Wei  and  Ritter, Alan  and  Grishman, Ralph},
  title     = {Gathering and Generating Paraphrases from Twitter with Application to Normalization},
  booktitle = {Proceedings of the Sixth Workshop on Building and Using Comparable Corpora},
  month     = {August},
  year      = {2013},
  address   = {Sofia, Bulgaria},
  publisher = {Association for Computational Linguistics},
  pages     = {121--128},
  url       = {http://www.aclweb.org/anthology/W13-2515}
}