Complex sentence: Zoidberg notices a single white hair on the Professor's coat and deduces that he does not have hyper-malaria, but rather yetiism, which he had contracted after having been scratched by the Tritonian yeti.
Split into simpler sentences: Zoidberg notices a single white hair on the Professor's coat and deduces that he does not have hyper-malaria. Rather, he has contracted yetiism after having been scratched by the Tritonian yeti.