general_fact: 9009 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9009 is a centered cube number.
trivia: 9009 is an unremarkable number.
historical_date: August 30th is the day in 1974 that a powerful bomb explodes at the Mitsubishi Heavy Industries headquarters in Marunouchi, Tokyo, Japan.