@article {5230,
	title = {Report on the 15th Round of NII Testbeds and Community for Information Access Research (NTCIR-15)},
	journal = {SIGIR Forum},
	volume = {55},
	year = {2021},
	pages = {21:1--21:6},
	doi = {10.1145/3527546.3527570},
	author = {Makoto P. Kato and Yiqun Liu and Noriko Kando and Charles Clarke}
}
