general_fact: 16207 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 16207 is a boring number.
trivia: 16207 is a boring number.
historical_date: May 15th is the day in 392 that Emperor Valentinian II is assassinated while advancing into Gaul against the Frankish usurper Arbogast.