general_fact: 9399 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9399 is an unremarkable number.
trivia: 9399 is an unremarkable number.
historical_date: September 24th is the day in 1645 that Battle of Rowton Heath, Parliamentarian victory over a Royalist army commanded in person by King Charles.