Input (grade 11): But short-sighted impressario Tetti-Tatti believes that the whale has simply swallowed an opera singer, and chases him with a harpoon.
Output (grade 12): However, the producer of the theater, Tetti-Tatti, thinks Willie swallowed an opera singer, and Tetti-Tatti chases Willie with a harpoon (a spear used to on whales).