general_fact: 25193 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 25193 is an unremarkable number.
trivia: 25193 is an uninteresting number.
historical_date: December 21st is the day in 1969 that the United Nations adopts the Convention on the Elimination of All Forms of Racial Discrimination.