In this context, the two factors involved are sometimes spoken of as something you have and something you know. A common example of two-factor authentication is a bank card: the card itself is the physical item and the personal identification number (PIN) is the data that goes with it.
The 49ers would become the second best team in the league until it dissolved after the 49ers first season, and they joined the NFL ranks along with the Cleveland Browns and the Baltimore Colts. The San Francisco 49ers get their name from the California gold-seekers who stampeded the area in 1849.
Brown named his team the Bengals in recognition of previous Cincinnati pro football franchises with the same name in the 1930s and 1940s. Brown himself returned to the coaching ranks on the Bengals sidelines for the first eight years.