@inproceedings{bi-etal-2020-knowledge,
    title = "Knowledge-enriched, Type-constrained and Grammar-guided Question Generation over Knowledge Bases",
    author = "Bi, Sheng  and
      Cheng, Xiya  and
      Li, Yuan-Fang  and
      Wang, Yongzhen  and
      Qi, Guilin",
    editor = "Scott, Donia  and
      Bel, Nuria  and
      Zong, Chengqing",
    booktitle = "Proceedings of the 28th International Conference on Computational Linguistics",
    month = dec,
    year = "2020",
    address = "Barcelona, Spain (Online)",
    publisher = "International Committee on Computational Linguistics",
    url = "https://aclanthology.org/2020.coling-main.250/",
    doi = "10.18653/v1/2020.coling-main.250",
    pages = "2776--2786"
}