general_fact: 6861 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 6861 is a value of n for which s(n-1) + s(n+1) = s(2n).
trivia: 6861 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 1976 that a Bolivian Boeing 707 cargo jet crashes in Santa Cruz, Bolivia, killing 100 (97, mostly children, killed on the ground).