@proceedings{ws-2009-naacl-hlt,
    title = "Proceedings of the {NAACL} {HLT} 2009 Workshop on Semi-supervised Learning for Natural Language Processing",
    editor = "Wang, Qin Iris  and
      Duh, Kevin  and
      Lin, Dekang",
    month = jun,
    year = "2009",
    address = "Boulder, Colorado",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/W09-2200/"
}