general_fact: 61850 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 61850 is an uninteresting number.
trivia: 61850 is an uninteresting number.
historical_date: May 3rd is the day in 1963 that the police force in Birmingham, Alabama switches tactics and responds with violent force to stop the "Birmingham campaign" protesters.