@article{Xu-EtAl-2014:TACL,
  author =  {Wei Xu and Alan Ritter and Chris Callison-Burch and William B. Dolan and Yangfeng Ji},
  title =   {Extracting Lexically Divergent Paraphrases from {Twitter}},
  journal = {Transactions of the Association for Computational Linguistics (TACL)},
  volume =  {2},
  number =  {1},
  year =    {2014},
  url = {http://www.cis.upenn.edu/~xwe/files/tacl2014-extracting-paraphrases-from-twitter.pdf}
}