math_fact: 64233 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 64233 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: November 11th is the day in 1887 that Anarchist Haymarket Martyrs August Spies, Albert Parsons, Adolph Fischer and George Engel are executed.