@article{452,
  author = {Makoto Kato and Yiqun Liu and Noriko Kando and Charles Clarke},
  title = {Report on the 15th Round of NII Testbeds and Community for Information Access Research (NTCIR-15)},
  year = {2021},
  journal = {SIGIR Forum},
  volume = {55},
  pages = {1-21},
  doi = {10.1145/3527546.3527570},
}