general_fact: 9583 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9583 is the number of subsets of {1, 2, 3, ... 20} that do not contain solutions to x + y = z.
trivia: 9583 is an unremarkable number.
historical_date: March 27th is the day in 1871 that the first international rugby football match, England v. Scotland, is played in Edinburgh at Raeburn Place.