general_fact: 47490 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47490 is a boring number.
trivia: 47490 is an unremarkable number.
historical_date: January 8th is the day in 1920 that the steel strike of 1919 ends in a complete failure for the Amalgamated Association of Iron, Steel and Tin Workers labor union.