Complex sentence: The Amazing Rhythm Aces is an American country rock group, which has characterized its music as "American music" or "roots music"--rock, country, blues, R&B, folk, reggae and Latino.
Split into simpler sentences: The Amazing Rhythm Aces is an American country rock group. The band has characterized their music as "American Music" or "Roots Music"--rock, country, blues, R&B, folk, reggae and Latino.