@inproceedings{de-roeck-etal-1991-helpful,
    title = "Helpful Answers to Modal and Hypothetical Questions",
    author = "De Roeck, Anne  and
      Ball, Richard  and
      Brown, Keith  and
      Fox, Chris  and
      Groefsema, Marjolein  and
      Obeid, Nadim  and
      Turner, Ray",
    editor = {Kunze, J{\"u}rgen  and
      Reimann, Dorothee},
    booktitle = "Fifth Conference of the {E}uropean Chapter of the Association for Computational Linguistics",
    month = apr,
    year = "1991",
    address = "Berlin, Germany",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/E91-1045/"
}