Complex sentence: Plankton steals the formula, leaving a fake in its place; however, just as he is about to escape, SpongeBob catches him and they both have a tug of war over the formula, but it magically vanishes before either can claim it.
Split into simpler sentences: Plankton steals the formula, leaving a fake in its place; however, just as he is about to escape, SpongeBob catches him. They have a tug of war over the formula, but it magically vanishes before either can claim it.