@inproceedings{knowledgeenrichedtypeconstrainedand,
  title = {Knowledge-enriched, Type-constrained and Grammar-guided Question Generation over Knowledge Bases},
  author = {Sheng Bi and Xiya Cheng and Yuan-Fang Li and Yongzhen Wang and Guilin Qi},
  year = {2020},
  booktitle = {COLING 2020 8},
  eprint = {2010.03157},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2010.03157v3},
}