Complex sentence: KCHV switched back to KCLB in 1993 (after the Christian station changed to KLVR), and then the Coachella station switched to KNWZ 970 in 2000.
Split into simpler sentences: KCHV switched back to KCLB in 1993 after the Christian station changed to KLVR. The Coachella station then switched to KNWZ 970 in 2000.