general_fact: 8371 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 8371 is an unremarkable number.
trivia: 8371 is a boring number.
historical_date: December 1st is the day in 1974 that TWA Flight 514, a Boeing 727, crashes northwest of Dulles International Airport killing all 92 people on board.