general_fact: 600 is the advertised number of miles that NASCAR runs in the Coca-Cola 600, the longest race on any of the NASCAR circuits.
math_fact: 600 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 600 is the advertised number of miles that NASCAR runs in the Coca-Cola 600, the longest race on any of the NASCAR circuits.
historical_date: August 22nd is the day in 1985 that Manchester Air Disaster sees 55 people killed when a fire breaks out on a commercial aircraft at Manchester Airport.