@inproceedings{hayashi-nagata-2016-empty,
    title = "Empty element recovery by spinal parser operations",
    author = "Hayashi, Katsuhiko  and
      Nagata, Masaaki",
    editor = "Erk, Katrin  and
      Smith, Noah A.",
    booktitle = "Proceedings of the 54th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)",
    month = aug,
    year = "2016",
    address = "Berlin, Germany",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P16-2016/",
    doi = "10.18653/v1/P16-2016",
    pages = "95--100"
}