general_fact: 47478 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47478 is an uninteresting number.
trivia: 47478 is an unremarkable number.
historical_date: December 27th is the day in 1845 that Ether anesthetic is used for childbirth for the first time by Dr. Crawford Williamson Long in Jefferson, Georgia.