title: List of Cleveland Browns seasons
context: The Cleveland Browns were a charter member club of the All-America Football Conference (AAFC) when the league was founded in 1946. From 1946 to 1949, the Browns won each of the league’s four championships. The National Football League (NFL) does not recognize the Browns’ AAFC championships, the Pro Football Hall of Fame does recognize the team’s championships, which is reflected in this list. When the AAFC folded in 1949, the Browns were absorbed into the NFL in 1950. The Browns went on to win three NFL championships, nearly dominating the NFL in the 1950s, and won one more NFL championship in 1964. The team has yet to appear in a Super Bowl, however. Overall, the team has won eight championships: four in the AAFC, and four in the NFL.
question: When did the the Cleveland Browns win their last superbowl?
answers: 1964