general_fact: 47623 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47623 is an unremarkable number.
trivia: 47623 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: May 21st is the day in 1937 that a Soviet station, North Pole-1, becomes the first scientific research settlement to operate on the drift ice of the Arctic Ocean.