@inproceedings{purver-etal-2001-means,
    title = "On the Means for Clarification in Dialogue",
    author = "Purver, Matthew  and
      Ginzburg, Jonathan  and
      Healey, Patrick",
    booktitle = "Proceedings of the Second {SIG}dial Workshop on Discourse and Dialogue",
    year = "2001",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/W01-1616/"
}