My previous question got deleted. What did I do wrong?

Yesterday I posted up a question asking who the 15th president of the united states was. i can assure you there was clearly no intention for any satire or criticisim against the politician whatsoever. But when I signed in to check the answers, I found out they deleted my question due to the infringement of Community Guidelines or something like that. how can the question asking the name of a former president possibly be against any rules? what on earth were they thinking to just delete my question even without asking me?