https://www.govinfo.gov/content/pkg/GAOREPORTS-RCED-94-153/html/GAOREPORTS-RCED-94-153.htm
Authors. US Government Accountability Office
Venue. (RCED-94-153), full text at GovInfo
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.