@inproceedings{callison-burch-2008-syntactic,
    title = "Syntactic Constraints on Paraphrases Extracted from Parallel Corpora",
    author = "Callison-Burch, Chris",
    editor = "Lapata, Mirella  and
      Ng, Hwee Tou",
    booktitle = "Proceedings of the 2008 Conference on Empirical Methods in Natural Language Processing",
    month = oct,
    year = "2008",
    address = "Honolulu, Hawaii",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/D08-1021/",
    pages = "196--205"
}