@inproceedings{maccartney-manning-2009-extended,
    title = "An extended model of natural logic",
    author = "MacCartney, Bill  and
      Manning, Christopher D.",
    editor = "Bunt, Harry",
    booktitle = "Proceedings of the Eight International Conference on Computational Semantics",
    month = jan,
    year = "2009",
    address = "Tilburg, The Netherlands",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/W09-3714/",
    pages = "140--156"
}