@inproceedings{he-etal-2022-space,
    title = "{SPACE}-2: Tree-Structured Semi-Supervised Contrastive Pre-training for Task-Oriented Dialog Understanding",
    author = "He, Wanwei  and
      Dai, Yinpei  and
      Hui, Binyuan  and
      Yang, Min  and
      Cao, Zheng  and
      Dong, Jianbo  and
      Huang, Fei  and
      Si, Luo  and
      Li, Yongbin",
    editor = "Calzolari, Nicoletta  and
      Huang, Chu-Ren  and
      Kim, Hansaem  and
      Pustejovsky, James  and
      Wanner, Leo  and
      Choi, Key-Sun  and
      Ryu, Pum-Mo  and
      Chen, Hsin-Hsi  and
      Donatelli, Lucia  and
      Ji, Heng  and
      Kurohashi, Sadao  and
      Paggio, Patrizia  and
      Xue, Nianwen  and
      Kim, Seokhwan  and
      Hahm, Younggyun  and
      He, Zhong  and
      Lee, Tony Kyungil  and
      Santus, Enrico  and
      Bond, Francis  and
      Na, Seung-Hoon",
    booktitle = "Proceedings of the 29th International Conference on Computational Linguistics",
    month = oct,
    year = "2022",
    address = "Gyeongju, Republic of Korea",
    publisher = "International Committee on Computational Linguistics",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/2022.coling-1.46/",
    pages = "553--569"
}