general_fact: 81707 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 81707 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 81707 is an unremarkable number.
historical_date: September 15th is the day in 1981 that the Senate Judiciary Committee unanimously approves Sandra Day O'Connor to become the first female justice of the Supreme Court of the United States.