@InProceedings{rello-baezayates-mitkov:2012:EACL2012,
  author    = {Rello, Luz  and  Baeza-Yates, Ricardo  and  Mitkov, Ruslan},
  title     = {Elliphant: Improved Automatic Detection of Zero Subjects and Impersonal Constructions in Spanish},
  booktitle = {Proceedings of the 13th Conference of the European Chapter of the Association for Computational Linguistics},
  month     = {April},
  year      = {2012},
  address   = {Avignon, France},
  publisher = {Association for Computational Linguistics},
  pages     = {706--715},
  url       = {http://www.aclweb.org/anthology/E12-1072}
}