@InProceedings{hoffmann-EtAl:2011:ACL-HLT2011,
  author    = {Hoffmann, Raphael  and  Zhang, Congle  and  Ling, Xiao  and  Zettlemoyer, Luke  and  Weld, Daniel S.},
  title     = {Knowledge-Based Weak Supervision for Information Extraction of Overlapping Relations},
  booktitle = {Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies},
  month     = {June},
  year      = {2011},
  address   = {Portland, Oregon, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {541--550},
  url       = {http://www.aclweb.org/anthology/P11-1055}
}