@inproceedings{xu-etal-2013-open,
    title = "Open Information Extraction with Tree Kernels",
    author = "Xu, Ying  and
      Kim, Mi-Young  and
      Quinn, Kevin  and
      Goebel, Randy  and
      Barbosa, Denilson",
    editor = "Vanderwende, Lucy  and
      Daum{\'e} III, Hal  and
      Kirchhoff, Katrin",
    booktitle = "Proceedings of the 2013 Conference of the North {A}merican Chapter of the Association for Computational Linguistics: Human Language Technologies",
    month = jun,
    year = "2013",
    address = "Atlanta, Georgia",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/N13-1107/",
    pages = "868--877"
}