general_fact: 5311 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 5311 is an unremarkable number.
trivia: 5311 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: July 16th is the day in 1990 that the Luzon Earthquake strikes in Benguet, Pangasinan, Nueva Ecija, La Union, Aurora, Bataan, Zambales and Tarlac, Philippines, with an intensity of 7.7.