general_fact: 12838 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 12838 is an uninteresting number.
trivia: 12838 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: February 23rd is the day in 1821 that Alexander Ypsilantis starts the Greek War of Independence in Iași, Wallachia, modern-day Romania.