general_fact: 1518 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 1518 is the sum of its proper divisors that contain the digit 5.
trivia: 1518 is an unremarkable number.
historical_date: February 26th is the day in 1909 that Kinemacolor, the first successful color motion picture process, is first shown to the general public at the Palace Theatre in London.