general_fact: 47918 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47918 is an unremarkable number.
trivia: 47918 is an uninteresting number.
historical_date: March 12th is the day in 1930 that Mahatma Gandhi leads a 200-mile march, known as the Salt March, to the sea in defiance of British opposition, to protest the British monopoly on salt.