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 "Kansas (band)"): Kansas is an American rock band that became popular in the 1970s initially on album-oriented rock charts and later with hit singles such as "Carry On Wayward Son" and "Dust in the Wind".
Relevant evidence: Yes