Conversation so far:
when did the raiders win the super bowl
The Raiders won the Super Bowl championship in 1977, 1981, and 1984.
when were the raiders founded
The Raiders were founded in 1960 as one of the eight original teams of the AFL
when was al davis hired as coach of the raiders
Al Davis first came to the Raiders in January 1963, to hold the demanding dual positions of head coach and general manager.

Question: how long did al coach the team
Self-contained rewrite: how long did al davis coach the raiders