Complex sentence: From the 1960s to the 1980s, it was broadcasting a Top 40 music format, then later a Full Service format featuring local news, talk, sports, and MOR adult pop music.
Split into simpler sentences: From the 1960s to the 1980s, it was broadcasting a Top 40 music format. It later broadcasted a Full Service format featuring local news, talk, sports, and MOR adult pop music.