general_fact: 9399 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9399 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 9399 is an unremarkable number.
historical_date: September 24th is the day in 1780 that Benedict Arnold flees to British Army lines when the arrest of British Major John André exposes Arnold's plot to surrender West Point.