Complex sentence: Filming took place in the Southfork living room, and the'Southfork' Jock portrait was replaced by the replica of the original, and was featured heavily in the show, particularly during a Jim Davis tribute.
Split into simpler sentences: Filming took place in the Southfork living room, and the "Southfork" Jock portrait was replaced by the replica of the original. The replica was featured heavily in the show, particularly during a Jim Davis tribute.