general_fact: 13740 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 13740 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 13740 is a boring number.
historical_date: August 13th is the day in 1968 that Alexandros Panagoulis attempts to assassinate the Greek dictator Colonel Georgios Papadopoulos in Varkiza, Athens.