@InProceedings{xu-callisonburch-dolan:2015:SemEval,
  author    = {Xu, Wei  and  Callison-Burch, Chris  and  Dolan, Bill},
  title     = {SemEval-2015 Task 1: Paraphrase and Semantic Similarity in Twitter (PIT)},
  booktitle = {Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015)},
  month     = {June},
  year      = {2015},
  address   = {Denver, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {1--11},
  url       = {http://www.aclweb.org/anthology/S15-2001}
}