general_fact: 318 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 318 is the number of unlabeled partially ordered sets of 6 elements.
trivia: 318 is an unremarkable number.
historical_date: November 13th is the day in 1841 that James Braid first sees a demonstration of animal magnetism, which leads to his study of the subject he eventually calls hypnotism.