general_fact: 21056 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 21056 is an uninteresting number.
trivia: 21056 is an unremarkable number.
historical_date: August 24th is the day in 1989 that Cincinnati Reds manager Pete Rose is banned from baseball for gambling by Commissioner A. Bartlett Giamatti.