Complex sentence: On April 12, Mudvayne released "Lost and Found"; the album's first single, "Happy?" featured complex guitar playing, while the song "Choices" was described by Gray as "the eight-minute opus".
Split into simpler sentences: On April 12, Mudvayne released "Lost and Found". The album's first single, "Happy?", featured complex guitar work and Gray described "Choices" as "the eight-minute opus".