Complex sentence: KMYZ-FM signed on the air in 1985 as a Classic rockAdult Top 40 station, known then simply as "Z-104.5" it later changed to CHR/Adult Top-40 as "Z-104.5".
Split into simpler sentences: KMYZ-FM signed on the air in 1985 as a Classic Rock station. It later changed to CHR/Adult Top-40 as "Z-104.5".