Complex sentence: A KitKat commercial was later made featuring Father Christmas (from this film) in a whole new scene, where he was seen eating a KitKat as the advert was advertising the product having only 107 calories.
Split into simpler sentences: A KitKat commercial was later made featuring Father Christmas (from this film) in a whole new scene, where he was seen eating a KitKat. As the advert was advertising the product having only 107 calories.