Complex sentence: On December 25,2002, WSJK-TV was renamed WETP-TV for the next seven and a half years, both stations would use the branding East Tennessee Public Television or ETP-TV for short.
Split into simpler sentences: On December 25,2002, WSJK-TV was renamed WETP-TV. For the next seven and a half years, both stations would use the branding "East Tennessee Public Television" or "ETP-TV" for short.