premise: Creedence Clearwater Revival was a band.
hypothesis: Creedence Clearwater Revival , often informally abbreviated to Creedence or CCR , was an American rock band active in the late 1960s and early 1970s . The band consisted of lead vocalist , lead guitarist , and primary songwriter John Fogerty , his brother rhythm guitarist Tom Fogerty , bassist Stu Cook and drummer Doug Clifford . The band performed at 1969 's famed Woodstock Festival . Creedence Clearwater Revival 's music is still a staple of U.S. radio airplay ; the band has sold 26 million albums in the United States alone . Rolling Stone ranked the band 82nd on its list of the 100 greatest artists of all time .