math_fact: 28944 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 28944 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: March 30th is the day in 1979 that Airey Neave, a British Member of Parliament, is killed by a car bomb as he exits the Palace of Westminster.