general_fact: 5728 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 5728 is a boring number.
trivia: 5728 is an unremarkable number.
historical_date: September 6th is the day in 1943 that the Monterrey Institute of Technology, one of the largest and most influential private universities in Latin America, is founded in Monterrey, Mexico.