general_fact: 611 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 611 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 611 is a boring number.
historical_date: September 2nd is the day in 421 that Emperor Constantius III dies suddenly of an illness, his wife Galla Placidia becomes for the second time widow.