@article{hierarchicalreinforcementlearningforopen,
  title = {Hierarchical Reinforcement Learning for Open-Domain Dialog},
  author = {Abdelrhman Saleh and Natasha Jaques and Asma Ghandeharioun and Judy Hanwen Shen and Rosalind Picard},
  year = {2019},
  eprint = {1909.07547},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1909.07547v3},
}