math_fact: 7791 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 7791 is an uninteresting number.
historical_date: April 30th is the day in 1863 that a 65-man French Foreign Legion infantry patrol fought a force of nearly 2,000 Mexican soldiers to nearly the last man in Hacienda Camarón, Mexico.