general_fact: 18137 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 18137 is an unremarkable number.
trivia: 18137 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: August 27th is the day in 1985 that the Nigerian government is peacefully overthrown by Army Chief of Staff Major General Ibrahim Babangida.