general_fact: 55148 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 55148 is an unremarkable number.
trivia: 55148 is a boring number.
historical_date: December 27th is the day in 1831 that Charles Darwin embarks on his journey aboard the HMS Beagle, during which he will begin to formulate the theory of evolution.