general_fact: 47984 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47984 is an uninteresting number.
trivia: 47984 is an uninteresting number.
historical_date: May 17th is the day in 1980 that General Chun Doo-hwan of South Korea seizes control of the government and declares martial law in order to suppress student demonstrations.