general_fact: 13216 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 13216 is an uninteresting number.
trivia: 13216 is an uninteresting number.
historical_date: March 7th is the day in 1989 that Iran and the United Kingdom break diplomatic relations after a row over Salman Rushdie and his controversial novel.