general_fact: 81968 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 81968 is an uninteresting number.
trivia: 81968 is an uninteresting number.
historical_date: June 2nd is the day in 1979 that Pope John Paul II first official visit to his native Poland, becoming the first Pope to visit a Communist country.