general_fact: 9099 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9099 is the number of ways to 3-color the faces of a dodecahedron.
trivia: 9099 is an unremarkable number.
historical_date: November 28th is the day in 1979 that Air New Zealand Flight 901, a DC-10 operated sightseeing flight over Antarctica, crashes into Mount Erebus, killing all 257 people on board.