math_fact: 9272 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 9272 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: May 20th is the day in 1983 that First publications of the discovery of the HIV virus that causes AIDS in the journal Science by Luc Montagnier.