How to record Facts for human and machine consumption and the usage of those recorded Facts by humans, machines, news orgs, communities, etc.  is something that was only lightly documented about 4+ years ago?
I don't know what happened to that document but thought it was very useful for getting everyone level set.  Some of it was glanced over by Schema.org members at the time when Schema 3.2 was released.
I would love to see it brought back to life where the community could comment on it, so that we have clear signals of just what gaps remain in Wikimedia's ecosystem for capturing Facts and using them.

In doing so, we could invite fact check orgs of how/where they themselves see gaps remaining in Wikimedia's ecosystem to support their missions such as:

After doing those round table discussions on a collaborative document, then I think a clearer picture of what is really needed would naturally appear.