general_fact: 13961 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 13961 is an unremarkable number.
trivia: 13961 is a boring number.
historical_date: March 22nd is the day in 1765 that the British Parliament passes the Stamp Act that introduces a tax to be levied directly on its American colonies.