@inproceedings{ichikawa-etal-2006-efficient,
    title = "Efficient Sentence Retrieval Based on Syntactic Structure",
    author = "Ichikawa, Hiroshi  and
      Hakoda, Keita  and
      Hashimoto, Taiichi  and
      Tokunaga, Takenobu",
    booktitle = "Proceedings of the {COLING}/{ACL} 2006 Main Conference Poster Sessions",
    month = jul,
    year = "2006",
    address = "Sydney, Australia",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P06-2052/",
    pages = "399--406"
}