@inproceedings{controllableopenendedquestiongeneration,
  title = {Controllable Open-ended Question Generation with A New Question Type Ontology},
  author = {Shuyang Cao and Lu Wang},
  year = {2021},
  booktitle = {ACL 2021 5},
  eprint = {2107.00152},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2107.00152v1},
}