math_fact: 36990 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 36990 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: April 10th is the day in 1826 that the 10,500 inhabitants of the Greek town Missolonghi start leaving the town after a year's siege by Turkish forces.