general_fact: 8158 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 8158 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 8158 is an uninteresting number.
historical_date: May 2nd is the day in 2008 that Cyclone Nargis makes landfall in Myanmar killing over 138,000 people and leaving millions of people homeless.