Brian Freiesleben spotted Google possibly testing a new knowledge panel feature. The feature asks the searcher to enter in missing fact data it doesn't seem to have access to. Google asked "help others by suggesting these missing facts" and had a button for the specific missing fact.
Brain posted the following screen shot on Twitter:
How interesting, don't you think? I tried to replicate this but I was unable to do so.
Do you see this?
Here is another:
Google is testing if it wants you to edit the knowledge graph.
— Valentin Pletzer (@VorticonCmdr) July 18, 2019
"Help others by suggesting these missing facts" #google #mobile #knowledgegraph pic.twitter.com/rt189JQgjy
Forum discussion at Twitter.
Update:
So apparently this is related to a "know simple" query in a "special content result block" according to page 78 in the updated search quality eval guidelines. pic.twitter.com/8Iu9i9qf9S
— Brian Freiesleben (@type_SEO) September 6, 2019