Complex sentence: WSVO first launched with the callsign WSGM in 1959, before changing their callsign to WKDW-FM on February 13,1992, and yet again to WSVO on January 31,1996.
Split into simpler sentences: WSVO first launched with the callsign WSGM in 1959. On February 13,1992, the callsign was changed to WKDW-FM, and yet again to WSVO on January 31,1996.