@inproceedings{zhang-chai-2009-know,
    title = "What do We Know about Conversation Participants: Experiments on Conversation Entailment",
    author = "Zhang, Chen  and
      Chai, Joyce",
    editor = "Healey, Patrick  and
      Pieraccini, Roberto  and
      Byron, Donna  and
      Young, Steve  and
      Purver, Matthew",
    booktitle = "Proceedings of the {SIGDIAL} 2009 Conference",
    month = sep,
    year = "2009",
    address = "London, UK",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-emnlp/W09-3930/",
    pages = "206--215"
}