general_fact: 1491 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 1491 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 1491 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: January 30th is the day in 1956 that American civil rights leader Martin Luther King, Jr.'s home is bombed in retaliation for the Montgomery Bus Boycott.