general_fact: 91951 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 91951 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 91951 is an uninteresting number.
historical_date: October 2nd is the day in 1970 that a plane carrying the Wichita State University football team, administrators, and supporters crashes in Colorado killing 31 people.