general_fact: 311 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 311 is a boring number.
trivia: 311 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: November 6th is the day in 2004 that an express train collides with a stationary car near the village of Ufton Nervet, England, killing 7 and injuring 150.