general_fact: 4190 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 4190 is an unremarkable number.
trivia: 4190 is an uninteresting number.
historical_date: June 21st is the day in 1919 that the Royal Canadian Mounted Police fire a volley into a crowd of unemployed war veterans, killing two, during the Winnipeg General Strike.