@inproceedings{collins-singer-1999-unsupervised,
    title = "Unsupervised Models for Named Entity Classification",
    author = "Collins, Michael  and
      Singer, Yoram",
    booktitle = "1999 Joint {SIGDAT} Conference on Empirical Methods in Natural Language Processing and Very Large Corpora",
    year = "1999",
    url = "https://preview.aclanthology.org/fix-sig-urls/W99-0613/"
}