general_fact: 9219 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9219 is a value of n for which |cos(n)| is smaller than any previous integer.
trivia: 9219 is an unremarkable number.
historical_date: March 28th is the day in 2005 that the 2005 Sumatra earthquake rocks Indonesia, and at magnitude 8.7 is the fourth strongest earthquake since 1965.