math_fact: 26831 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 26831 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: June 16th is the day in 1903 that Roald Amundsen commences the first east-west navigation of the Northwest Passage, leaving Oslo, Norway.