@inproceedings{Olney-etAl:2003:EDUC,
  author = {Olney, Andrew  and  Louwerse, Max  and  Matthews, Eric  and  Marineau, Johanna  and  Hite-Mitchell, Heather  and  Graesser, Arthur},
  title  = {Utterance Classification in AutoTutor},
  booktitle = {Proceedings of the HLT-NAACL 03 Workshop on Building Educational Applications Using Natural Language Processing},
  editor = {Jill Burstein and Claudia Leacock},
  url    = {http://www.aclweb.org/anthology/W03-0201.pdf},
  year   = 2003,
  pages  = {1--8}