https://worldathletics.org/news/press-release/world-relays-yokohama-2019-entry-lists
Entry lists published for IAAF World Relays Yokohama 2019 | PRESS-RELEASE | World Athletics
Entry lists for the IAAF World Relays Yokohama 2019 confirm that 790 athletes from 47 teams will descend on Japan for the global event on 11-12 May.
iaaf world relayspress releaseentrylistspublished
https://tn.wikipedia.org/wiki/IAAF_World_Relays?action=edit&redlink=1
Creating IAAF World Relays - Wikipedia
iaaf world relayscreatingwikipedia