math_fact: 47726 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 47726 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: September 1st is the day in 1980 that Major General Chun Doo-hwan becomes president of South Korea, following the resignation of Choi Kyu-hah.