math_fact: 47841 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 47841 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: December 25th is the day in 2007 that a tiger at the San Francisco Zoo escapes from its enclosure and attacks three people, killing one.