general_fact: 9876 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9876 is the largest 4-digit number with different digits.
trivia: 9876 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: January 14th is the day in 1954 that the Hudson Motor Car Company merges with Nash-Kelvinator Corporation forming the American Motors Corporation.