general_fact: 9473 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9473 is an uninteresting number.
trivia: 9473 is an unremarkable number.
historical_date: December 7th is the day in 1995 that the Galileo spacecraft arrives at Jupiter, a little more than six years after it was launched by Space Shuttle Atlantis during Mission STS-34.