Complex sentence: The humor strips with this theme, however, is not primarily slapstick, but relies on the circumstances surrounding the event; furthermore, no two of such strips have the same formula, as Schulz varied them significantly.
Split into simpler sentences: The humor strips with this theme, however, are not primarily slapstick, but rely on the circumstances surrounding the event. Furthermore, no two of such strips have the same formula, as Schulz varied them significantly.