general_fact: 47648 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47648 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 47648 is a boring number.
historical_date: June 15th is the day in 1985 that Rembrandt's painting Danaë is attacked by a man (later judged insane) who throws sulfuric acid on the canvas and cuts it twice with a knife.