general_fact: 91188 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 91188 is an unremarkable number.
trivia: 91188 is a boring 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.