@article{saleh2019hier,
  title={Hierarchical Reinforcement Learning for Open-Domain Dialog},
  author={Saleh, Abdelrhman and Jaques, Natasha and Ghandeharioun, Asma and Shen, Judy and Picard, Rosalind},
  journal={Proceedings of the Thirty-Fourth AAAI Conference on Artificial Intelligence},
  year={2019}
}