general_fact: 47590 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47590 is a boring number.
trivia: 47590 is an uninteresting number.
historical_date: April 18th is the day in 1980 that the Republic of Zimbabwe (formerly Rhodesia) comes into being, with Canaan Banana as the country's first President.