Question: Sedaka's Back is a compilation album that included songs that were turned into hits by other artists such as "Solitaire" by an American vocal and instrumental duo that recorded how many albums?   
Sentence (from "Sedaka's Back"): Also included were songs that were turned into hits by other artists: "Solitaire" (The Carpenters) and "Love Will Keep Us Together" (The Captain & Tennille).
Relevant evidence: Yes