general_fact: 91864 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 91864 is an uninteresting number.
trivia: 91864 is an uninteresting number.
historical_date: July 7th is the day in 1915 that an International Railway trolley with an extreme overload of 157 passengers crashes near Queenston, Ontario, killing 15.