Premise: Clifford Jarvis (August 26, 1941 – November 26, 1999) was an American hard bop and free jazz drummer, who in the 1980s moved to London, England, where he died. This entry is from Wikipedia , the user-contributed encyclopedia. It may not have been reviewed by professional editors and is licensed under an Attribution-ShareAlike Creative Commons License . If you find the biography content factually incorrect or highly offensive you can edit this article at Wikipedia
Hypothesis: Clifford Jarvis started playing drums professionally in 1961.