general_fact: 84145 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 84145 is an uninteresting number.
trivia: 84145 is an uninteresting number.
historical_date: May 19th is the day in 1536 that Anne Boleyn, the second wife of Henry VIII of England, is beheaded for adultery, treason, and incest.