@InProceedings{xu-grishman-zhao:2011:IJCNLP-2011,
  author    = {Xu, Wei  and  Grishman, Ralph  and  Zhao, Le},
  title     = {Passage Retrieval for Information Extraction using Distant Supervision},
  booktitle = {Proceedings of 5th International Joint Conference on Natural Language Processing},
  month     = {November},
  year      = {2011},
  address   = {Chiang Mai, Thailand},
  publisher = {Asian Federation of Natural Language Processing},
  pages     = {1046--1054},
  url       = {http://www.aclweb.org/anthology/I11-1117}
}