general_fact: 8175 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 8175 is an uninteresting number.
trivia: 8175 is a boring number.
historical_date: May 19th is the day in 1934 that Zveno and the Bulgarian Army engineer a coup d'état and install Kimon Georgiev as the new Prime Minister of Bulgaria.