math_fact: 83577 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 83577 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: October 28th is the day in 1628 that the Siege of La Rochelle, which had lasted for 14 months, ends with the surrender of the Huguenots.