general_fact: 84217 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 84217 is an unremarkable number.
trivia: 84217 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: July 30th is the day in 1971 that an All Nippon Airways Boeing 727 and a Japanese Air Force F-86 collide over Morioka, Japan killing 162.