Question: "Rags to Riches" is a 1953 popular song by Richard Adler and Jerry Ross, the best-known version of the song, recorded by Tony Bennett with which Canadian bandleader, orchestrator, composer and conductor, known for his lush arrangements of pop and Christmas standards?
Sentence (from "Everybody Loves a Lover"): Its lyricist, Richard Adler, and its composer, Robert Allen, were both best known for collaborations with other partners.
Relevant evidence: No