@inproceedings{phillips-hendler-1980-impatient,
    title = "The Impatient Tutor: An Integrated Language Understanding System",
    author = "Phillips, Brian  and
      Hendler, James",
    booktitle = "{COLING} 1980 Volume 1: The 8th International Conference on Computational Linguistics",
    year = "1980",
    url = "https://preview.aclanthology.org/fix-sig-urls/C80-1072/"
}