Complex sentence: "The Gentle Art of Making Enemies" is one of the album's heavier songs, and takes its title from James McNeill Whistler's 1890 book "The Gentle Art of Making Enemies".
Split into simpler sentences: The Gentle Art of Making Enemies is one of the heaviest songs on the album. The song's title comes from James McNeill Whistler's 1890 book "The Gentle Art of Making Enemies".