Joseph Deane Bourke, 3rd Earl of Mayo has a Wikipedia article. It is largely filled with his genealogy and his ecclesiastic career.
Wikidata used to know him as a "list of" "person". An automated process added "instance of" "human" to Mr Bourke. These two claims are obviously mutually exclusive. Thanks to AutoList it is possible to find the items that have both claims.
At this stage you have to remove the wrong claim one at a time in Wikidata itself. The automated process operated on the presumption that an entry in a category that is named like "1794 deaths" are humans. As can be expected, this is mostly true.