This is really the biggest problem I have with the cards. They don't tell you anything at all about their source, and lead people to believe that Google itself has verified and checked the source of the information, making it very easy to treat them as "facts". A somewhat (possibly overly?) cynical viewpoint is that Google likes to keep it this way, since it makes it seem as if they're the arbiter of that information.
For simple bibliographical information like who someone’s spouses is, it is not copyrightable, and no attribution is needed.
Maybe the change hasn't been rolled out completely yet? I'm in Germany.
Very top of the article.
Define "fake results".