math_fact: 980 is the number of trees on 23 vertices with diameter 4.
trivia: 980 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: September 6th is the day in 1870 that Louisa Ann Swain of Laramie, Wyoming becomes the first woman in the United States to cast a vote legally after 1807.