@article{lifelongknowledgelearninginrulebased,
  title = {Lifelong Knowledge Learning in Rule-based Dialogue Systems},
  author = {Bing Liu and Chuhe Mei},
  year = {2020},
  eprint = {2011.09811},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2011.09811v1},
}