@article{orcas18millionclickedquerydocumentpairs,
  title = {ORCAS: 18 Million Clicked Query-Document Pairs for Analyzing Search},
  author = {Nick Craswell and Daniel Campos and Bhaskar Mitra and Emine Yilmaz and Bodo Billerbeck},
  year = {2020},
  eprint = {2006.05324},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2006.05324v2},
}