general_fact: 1524 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 1524 is an unremarkable number.
trivia: 1524 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: March 3rd is the day in 2005 that Steve Fossett becomes the first person to fly an airplane non-stop around the world solo without refueling.