@InProceedings{akbik-EtAl:2013:IJCNLP,
  author    = {Akbik, Alan  and  Visengeriyeva, Larysa  and  Kirschnick, Johannes  and  L\"{o}ser, Alexander},
  title     = {Effective Selectional Restrictions for Unsupervised Relation Extraction},
  booktitle = {Proceedings of the Sixth International Joint Conference on Natural Language Processing},
  month     = {October},
  year      = {2013},
  address   = {Nagoya, Japan},
  publisher = {Asian Federation of Natural Language Processing},
  pages     = {1312--1320},
  url       = {http://www.aclweb.org/anthology/I13-1187}
}