Complex sentence: He was one half of the duo Dave Carter and Tracy Grammer, who were heralded as the new "voice of modern folk music" in the months before Carter's unexpected death in July 2002.
Split into simpler sentences: He was one half of the duo Dave Carter and Tracy Grammer. The duo were being heralded as the new "voice of modern folk music" in the months before Carter's unexpected death in July 2002.