Premise: Glen Travis Campbell ( born April 22 , 1936 ) is an American rock and country music singer , musician , songwriter , television host and actor . Rock and roll ( often written as rock & roll or rock 'n' roll ) is a genre of popular music that originated and evolved in the United States during the late 1940s and early 1950s , from African American musical styles such as gospel , jump blues , jazz , boogie woogie , and rhythm and blues , along with country music .
Hypothesis: Glen Campbell writes rock and roll songs.
Label: ENTAILMENT