general_fact: 6818 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 6818 is 1^{8} + 2^{8} + 3^{8}.
trivia: 6818 is an uninteresting number.
historical_date: August 31st is the day in 1986 that the Soviet passenger liner Admiral Nakhimov sinks in the Black Sea after colliding with the bulk carrier Pyotr Vasev, killing 423.