general_fact: 47572 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47572 is a boring number.
trivia: 47572 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: March 31st is the day in 1146 that Bernard of Clairvaux preaches his famous sermon in a field at Vézelay, urging the necessity of a Second Crusade.