general_fact: 67991 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 67991 is an uninteresting number.
trivia: 67991 is an unremarkable number.
historical_date: February 24th is the day in 1980 that the United States Olympic Hockey team completes their Miracle on Ice by defeating Finland 4-2 to win the gold medal.