@article{challengesinbuildingintelligentopen,
  title = {Challenges in Building Intelligent Open-domain Dialog Systems},
  author = {Minlie Huang and Xiaoyan Zhu and Jianfeng Gao},
  year = {2019},
  eprint = {1905.05709},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1905.05709v3},
}