general_fact: 56684 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 56684 is a boring number.
trivia: 56684 is a boring number.
historical_date: March 12th is the day in 2009 that Financier Bernard Madoff plead guilty in New York to scamming $18 billion, the largest in Wall Street history.