@inproceedings{bird-2006-nltk,
    title = "{NLTK}: The {N}atural {L}anguage {T}oolkit",
    author = "Bird, Steven",
    editor = "Curran, James",
    booktitle = "Proceedings of the {COLING}/{ACL} 2006 Interactive Presentation Sessions",
    month = jul,
    year = "2006",
    address = "Sydney, Australia",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P06-4018/",
    doi = "10.3115/1225403.1225421",
    pages = "69--72"
}