general_fact: 7991 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 7991 is an uninteresting number.
trivia: 7991 is an uninteresting number.
historical_date: November 16th is the day in 1989 that a death squad composed of El Salvadoran army troops kills six Jesuit priests and two others at Jose Simeon Canas University.