Complex sentence: They seek help from Stan's uncle Jimbo and his war buddy Ned, who has lost his voice box, and together they discover an unusual creature which turns out to be extremely annoying to everyone in town with the exception of Cartman.
Split into simpler sentences: They seek help from Stan's uncle Jimbo and his war buddy Ned, who has lost his voice box. They discover an unusual creature which turns out to be extremely annoying to everyone in town with the except of Cartman.