@inproceedings{liu-etal-2007-automated,
    title = "Automated Vocabulary Acquisition and Interpretation in Multimodal Conversational Systems",
    author = "Liu, Yi  and
      Chai, Joyce  and
      Jin, Rong",
    editor = "Zaenen, Annie  and
      van den Bosch, Antal",
    booktitle = "Proceedings of the 45th Annual Meeting of the Association of Computational Linguistics",
    month = jun,
    year = "2007",
    address = "Prague, Czech Republic",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P07-1047/",
    pages = "368--375"
}