@InProceedings{nguyen-EtAl:2014:Coling,
  author    = {Nguyen, Dong  and  Trieschnigg, Dolf  and  Do\u{g}ru\"{o}z, A. Seza  and  Gravel, Rilana  and  Theune, Mariet  and  Meder, Theo  and  De Jong, Franciska},
  title     = {Why Gender and Age Prediction from Tweets is Hard: Lessons from a Crowdsourcing Experiment},
  booktitle = {Proceedings of COLING 2014, the 25th International Conference on Computational Linguistics: Technical Papers},
  month     = {August},
  year      = {2014},
  address   = {Dublin, Ireland},
  publisher = {Dublin City University and Association for Computational Linguistics},
  pages     = {1950--1961},
  url       = {http://www.aclweb.org/anthology/C14-1184}
}