https://ryr1.org/wp-content/uploads/2022/04/2019-anzalone.pdf
Authors. Anzalone, A. V. et al.
Venue. Nature
How the Institute flags it
established 1 time 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.