Question: Simon & Garfunkel were an American folk rock duo consisting of singer-songwriter Paul Simon and singer Art Garfunkel, their biggest hits—including "Bridge over Troubled Water" is a song by American music duo Simon & Garfunkel, produced  by the duo and who?
Sentence (from "Bridge over Troubled Water (song)"): The original studio recording employs elements of Phil Spector's "Wall of Sound" technique using L.A. session musicians from the Wrecking Crew.
Relevant evidence: No