general_fact: 47740 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47740 is an uninteresting number.
trivia: 47740 is an uninteresting number.
historical_date: September 15th is the day in 1968 that the Soviet Zond 5 spaceship is launched, becoming the first spacecraft to fly around the Moon and re-enter the Earth's atmosphere.