find clips that are not used by projects or productions

I'm trying to find a way to go through my database to find clips that are orphaned. When I click "Get Info" on a clip in the server in resources, it shows an area for "used by" (fcp projects) and "linked" (production folders). I'd like to search for clips that don't have anything in either area.


On the command line, I can run ./fcsvr_client list_parent_links /asset/25123 and it will show me the productions that use that movie asset.

But what is the command so I can do the same to see all projects that are a parent to that movie asset as well?

Thanks,