math_fact: 7957 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 7957 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: October 13th is the day in 1915 that the Battle for the Hohenzollern Redoubt marks the end of the Battle of Loos in northern France, World War I.