I'm trying to get a list of all articles (just the names, not the contents) that are indirectly within the category Japanese people in Wikipedia.
I've tried using a tool called Quick intersection. The results aren't too bad, but I'm getting some apparently spurious results. For example, I get the article John Andru, who competed in an Olympic games in Japan, but who I don't think is Japanese.
I don't know whether this is a bug with Quick Intersection, or whether there is incorrect data in Wikipedia that is causing John to be categorized this way.
One approach I considered was working out what categories John Andru directly or indirectly belonged to. However, I don't know how to do that. I tried searching for that information, but the only thing I've found so far is this question, which wasn't answered.
How can I fix this dirty data problem?
Is Quick Intersection the most suitable tool for what I'm trying to do?