general_fact: 4069 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 4069 is an uninteresting number.
trivia: 4069 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: February 20th is the day in 1339 that the Milanese army and the St. George's (San Giorgio) Mercenaries of Lodrisio Visconti clashed in the Battle of Parabiago.