general_fact: 8924 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 8924 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 8924 is an unremarkable number.
historical_date: June 6th is the day in 1644 that the Qing Dynasty Manchu forces led by the Shunzhi Emperor capture Beijing during the collapse of the Ming Dynasty.