Complex sentence: The soundtrack also contained use of the 1955 song "Unchained Melody", composed by Alex North with lyrics by Hy Zaret, which appears in both instrumental form and the 1965 recording by The Righteous Brothers.
Split into simpler sentences: The soundtrack also featured the 1955 song "Unchained Melody", composed by Alex North with lyrics by Hy Zaret. That song appears in both instrumental form and in the 1965 recording by The Righteous Brothers.