general_fact: 18313 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 18313 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 18313 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: February 19th is the day in 1600 that the Peruvian stratovolcano Huaynaputina explodes in the most violent eruption in the recorded history of South America.