@inproceedings{xu-etal-2009-discovery,
    title = "Discovery of Dependency Tree Patterns for Relation Extraction",
    author = "Xu, Hongzhi  and
      Hu, Changjian  and
      Shen, Guoyang",
    editor = "Kwong, Olivia",
    booktitle = "Proceedings of the 23rd Pacific Asia Conference on Language, Information and Computation, Volume 2",
    month = dec,
    year = "2009",
    address = "Hong Kong",
    publisher = "City University of Hong Kong",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/Y09-2050/",
    pages = "851--858"
}