math_fact: 53471 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 53471 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: May 25th is the day in 1926 that Sholom Schwartzbard assassinates Symon Petliura, the head of the Paris-based government-in-exile of Ukrainian People's Republic.