@inproceedings{qian-etal-2009-semi,
    title = "Semi-Supervised Learning for Semantic Relation Classification using Stratified Sampling Strategy",
    author = "Qian, Longhua  and
      Zhou, Guodong  and
      Kong, Fang  and
      Zhu, Qiaoming",
    editor = "Koehn, Philipp  and
      Mihalcea, Rada",
    booktitle = "Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing",
    month = aug,
    year = "2009",
    address = "Singapore",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/D09-1149/",
    pages = "1437--1445"
}