general_fact: 6989 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 6989 is an unremarkable number.
trivia: 6989 is an uninteresting number.
historical_date: February 18th is the day in 1913 that Pedro Lascuráin becomes President of Mexico for 45 minutes; this is the shortest term to date of any person as president of any country.