@InProceedings{liu-chai-jin:2007:ACLMain,
  author    = {Liu, Yi  and  Chai, Joyce  and  Jin, Rong},
  title     = {Automated Vocabulary Acquisition and Interpretation in Multimodal Conversational Systems},
  booktitle = {Proceedings of the 45th Annual Meeting of the Association of Computational Linguistics},
  month     = {June},
  year      = {2007},
  address   = {Prague, Czech Republic},
  publisher = {Association for Computational Linguistics},
  pages     = {368--375},
  url       = {http://www.aclweb.org/anthology/P07-1047}
}