general_fact: 91474 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 91474 is an unremarkable number.
trivia: 91474 is an unremarkable number.
historical_date: June 12th is the day in 1979 that Bryan Allen wins the second Kremer prize for a man powered flight across the English Channel in the Gossamer Albatross.