general_fact: 97921 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 97921 is an uninteresting number.
trivia: 97921 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: February 5th is the day in 1597 that a group of early Japanese Christians are killed by the new government of Japan for being seen as a threat to Japanese society.