Question: What year did an American rock band initially on album-oriented rock charts and later with hit singles written by Kerry Livgren for their 1976 album "Leftoverture", become popular?
Sentence (from "Carry On Wayward Son"): "Carry On Wayward Son" is a single recorded by Kansas and written by Kerry Livgren for their 1976 album "Leftoverture".
Relevant evidence: Yes