Complex sentence: The film is based on the novella "The Double" by Fyodor Dostoyevsky, about a man who is driven nearly to breakdown after finding out his life has been usurped by a doppelgänger.
Split into simpler sentences: The film is based on the novella "The Double" by Fyodor Dostoyevsky. It is about a man who is driven nearly to breakdown after finding out his life has been usurped by a doppelgänger.