Complex sentence: WUPE began operations in 1977 as a Top 40 station which evolved to soft adult contemporary, and eventually oldies before the call letters and format were moved to 100.1 FM.
Split into simpler sentences: WUPE began operations in 1977 as a Top 40 station which evolved to soft adult contemporary, and eventually oldies. After oldies the call letters and format were moved to 100.1 FM.