general_fact: 8873 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 8873 is an uninteresting number.
trivia: 8873 is an unremarkable number.
historical_date: April 16th is the day in 1945 that the United States Army liberates Nazi Sonderlager (high security) prisoner-of-war camp Oflag IV-C (better known as Colditz).