general_fact: 698 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 698 is 3^{2} + 4^{3} + 5^{4}.
trivia: 698 is an uninteresting number.
historical_date: November 28th is the day in 1627 that the Polish–Lithuanian Commonwealth Navy has its greatest and last victory in the Battle of Oliva.