https://www.nature.com/articles/s41586-023-06443-4
Authors. Metzger, S. L. et al
Venue. Nature 620:1037–1046
How the Institute flags it
established 2 times frontier 1 time
This source carries more than one flag across the corpus. That is not an inconsistency to resolve: the same work can be established evidence for one claim and frontier evidence for another, and the flag belongs to the use rather than to the source.