@InProceedings{callisonburch-ungar-pavlick:2015:Tutorials,
  author    = {Callison-Burch, Chris  and  Ungar, Lyle  and  Pavlick, Ellie},
  title     = {Crowdsourcing for NLP},
  booktitle = {Proceedings of the 2015 Conference of the North American Chapter of the Association for Computational Linguistics: Tutorial Abstracts},
  month     = {May--June},
  year      = {2015},
  address   = {Denver, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {2--3},
  url       = {http://www.aclweb.org/anthology/N15-4002}
}