general_fact: 80617 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 80617 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 80617 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: September 20th is the day in 1737 that the finish of the Walking Purchase which forces the cession of 1.2 million acres (4,860 km²) of Lenape-Delaware tribal land to the Pennsylvania Colony.