general_fact: 9910 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 9910 is the number of fixed 9-ominoes.
trivia: 9910 is an uninteresting number.
historical_date: February 17th is the day in 2006 that a massive mudslide occurs in Southern Leyte, Philippines; the official death toll is set at 1,126.