Complex sentence: Tilton was the guest host on an episode of "Saturday Night Live" on February 21,1981, which featured a parody of the famed "Who shot J.R.?" episode of "Dallas".
Split into simpler sentences: Tilton was the guest host on "Saturday Night Live" on February 21,1981. The episode in question featured a parody of the famed "Who shot J.R.?" episode of "Dallas".