That wrong info came from the pages which are listed in the search results. So much objectively, factually incorrect info is written in to blog posts which show up in google search results which then get copied to instant answers. Particularly historical info is filled with mistakes, people misunderstanding the context of some old news article and then taking it out of context to drop on wikipedia where it is taken as fact.
The error usually arises from Google misinterpreting and decontextualizing the page’s content, for example reading a table incorrectly then giving one stat as another stat. The page is correct, it’s Google that’s wrong.
