@article{grant2015challenge,
  title={A challenge for long-term knowledge base maintenance},
  author={Grant, Christan Earl and Wang, Daisy Zhe},
  journal={Journal of Data and Information Quality (JDIQ)},
  volume={6},
  number={2-3},
  pages={1--3},
  year={2015},
  publisher={ACM New York, NY, USA}
}