general_fact: 47840 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47840 is a boring number.
trivia: 47840 is an uninteresting number.
historical_date: December 24th is the day in 1826 that the Eggnog Riot at the United States Military Academy begins that night, wrapping up the following morning.