I decided it would be handy to have a sandbox already set up in administration to play with new features I am testing. As they get the bugs worked out they will be rolled into production but while I am playing with them they can stay in this space.
As of today (27 July 2024) this query is the same as the one which returns a list of Find A Grave memorials (mostly from Forest Lawn Glendale) which have been duplicated which for one reason or another are not being merged together or deleted very quickly. It will stay this way until I have some other utility to test out.