general_fact: 28566 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 28566 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 28566 is an uninteresting number.
historical_date: March 17th is the day in 1973 that the Pulitzer Prize-winning photograph Burst of Joy is taken, depicting a former prisoner of war being reunited with his family.