@inproceedings{heeman-1998-pos,
    title = "{POS} Tagging versus Classes in Language Modeling",
    author = "Heeman, Peter A.",
    booktitle = "Sixth Workshop on Very Large Corpora",
    year = "1998",
    url = "https://preview.aclanthology.org/fix-sig-urls/W98-1121/"
}