@inproceedings{improvingcommonsensequestionansweringby,
  title = {Improving Commonsense Question Answering by Graph-based Iterative Retrieval over Multiple Knowledge Sources},
  author = {Qianglong Chen and Feng Ji and Haiqing Chen and Yin Zhang},
  year = {2020},
  booktitle = {COLING 2020 8},
  eprint = {2011.02705},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2011.02705v1},
}