general_fact: 4678 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 4678 is a boring number.
trivia: 4678 is a boring number.
historical_date: October 21st is the day in 1971 that a gas explosion kills 22 people at a shopping centre in Clarkston, East Renfrewshire, near Glasgow, Scotland.