general_fact: 19718 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 19718 is a boring number.
trivia: 19718 is an unremarkable number.
historical_date: December 25th is the day in 2003 that the ill-fated Beagle 2 probe, released from the Mars Express Spacecraft on December 19, disappears shortly before its scheduled landing.