general_fact: 9253 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9253 is the smallest number that appears in its factorial 9 times.
trivia: 9253 is an unremarkable number.
historical_date: May 1st is the day in 1927 that the first cooked meals on a scheduled flight are introduced on an Imperial Airways flight from London to Paris.