Complex sentence: The cinematographer uses his cinema magic on him, but turns the Shah into the protagonist of "The Cow" (1969), a man who believes he is a cow, instructing him to pull a plough to help a poor family.
Split into simpler sentences: The cinematographer uses his cinema magic on him, but instead turns the Shah into the protagonist of "The Cow" (1969), who believes he is a cow. He then instructs him to pull a plough to help a poor family.