general_fact: 1023 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 1023 is the smallest number with 4 different digits.
trivia: 1023 is an unremarkable number.
historical_date: October 19th is the day in 1943 that Streptomycin, the first antibiotic remedy for tuberculosis, is isolated by researchers at Rutgers University.