Question: Sunny Side of Life focuses on one of the most notable acts in what genre of music?
Sentence (from "A. P. Carter"): Alvin Pleasant Delaney Carter (December 15, 1891 – November 7, 1960) professionally recording as A.P. Carter, was an American musician and founding member of The Carter Family, one of the most notable acts in the history of country music.
Relevant evidence: Yes