@misc{qu2019bert,
  title={BERT with History Answer Embedding for Conversational Question Answering},
  author={Chen Qu and Liu Yang and Minghui Qiu and W. Bruce Croft and Yongfeng Zhang and Mohit Iyyer},
  year={2019},
  eprint={1905.05412},
  archivePrefix={arXiv},
  primaryClass={cs.IR},
  doi={10.1145/3331184.3331341},
  url={https://arxiv.org/abs/1905.05412}
}