math_fact: 23771 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 23771 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: January 29th is the day in 1989 that Hungary establishes diplomatic relations with South Korea, making it the first Eastern Bloc nation to do so.