math_fact: 15384 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 15384 is an unremarkable number.
historical_date: February 12th is the day in 2002 that an Iran Air Tours Tupolev Tu-154 crashes in the mountains outside Khorramabad, Iran while descending for a landing at Khorramabad Airport, killing 119.