general_fact: 1422 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 1422 is the number of ways to stack 27 boxes in a line so that each box lies on the table or on a box next to 2 boxes.
trivia: 1422 is a boring number.
historical_date: November 22nd is the day in 1935 that the China Clipper, the first transpacific mail and passenger service, takes off from Alameda, California for its first commercial flight.