general_fact: 4919 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 4919 is a prime that remains prime if any digit is deleted.
trivia: 4919 is a boring number.
historical_date: June 19th is the day in 1978 that Garfield, holder of the Guinness World Record for the world's most widely syndicated comic strip, makes its debut.