general_fact: 19559 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 19559 is an uninteresting number.
trivia: 19559 is an unremarkable number.
historical_date: July 19th is the day in 1961 that Tunisia imposes a blockade on the French naval base at Bizerte; the French would capture the entire town four days later.