@inproceedings{zhou-etal-2008-semi,
    title = "Semi-Supervised Learning for Relation Extraction",
    author = "Zhou, GuoDong  and
      Li, JunHui  and
      Qian, LongHua  and
      Zhu, QiaoMing",
    booktitle = "Proceedings of the Third International Joint Conference on Natural Language Processing: Volume-{I}",
    year = "2008",
    url = "https://preview.aclanthology.org/ingest-emnlp/I08-1005/"
}