@inproceedings{yoon-etal-2011-non,
    title = "Non-scorable Response Detection for Automated Speaking Proficiency Assessment",
    author = "Yoon, Su-Youn  and
      Evanini, Keelan  and
      Zechner, Klaus",
    editor = "Tetreault, Joel  and
      Burstein, Jill  and
      Leacock, Claudia",
    booktitle = "Proceedings of the Sixth Workshop on Innovative Use of {NLP} for Building Educational Applications",
    month = jun,
    year = "2011",
    address = "Portland, Oregon",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/W11-1419/",
    pages = "152--160"
}