general_fact: 21774 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 21774 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 21774 is an unremarkable number.
historical_date: August 12th is the day in 1964 that Charlie Wilson, one of the Great Train Robbers, escapes from Winson Green Prison in Birmingham, England.