general_fact: 9187 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9187 is an uninteresting number.
trivia: 9187 is an uninteresting number.
historical_date: February 24th is the day in 1711 that the London première of Rinaldo by George Frideric Handel, the first Italian opera written for the London stage.