Complex sentence: A/2 featured a much heavier sound and contained a song called "Kidnapped", a song written for Polly Klaas, a girl who had been kidnapped and killed in 1993.
Split into simpler sentences: A/2 featured a much heavier sound and contained a song called "KIDNAPPED". KIDNAPPED was a song written for POLLY KLAAS, a girl who had been kidnapped and killed in 1993.