general_fact: 18007 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 18007 is a boring number.
trivia: 18007 is a boring number.
historical_date: April 19th is the day in 1809 that an Austrian corps is defeated by the forces of the Duchy of Warsaw in the Battle of Raszyn, part of the struggles of the Fifth Coalition.