@inproceedings{li-2009-learning,
    title = "Learning to Rank",
    author = "Li, Hang",
    editor = "McCarthy, Diana  and
      Zong, Chengqing",
    booktitle = "Tutorial Abstracts of {ACL}-{IJCNLP} 2009",
    month = aug,
    year = "2009",
    address = "Suntec, Singapore",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P09-5005/",
    pages = "5"
}