Complex sentence: Harper's Mill is a building located on Tom Sawyer Island at Disneyland, Walt Disney World's Magic Kingdom and Tokyo Disneyland named after the character "Joe Harper" from The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn.
Split into simpler sentences: Harper's Mill is a building located on Tom Sawyer Island at Disneyland, Walt Disney World's Magic Kingdom and Tokyo Disneyland. They are all named after the character, "Joe Harper", from The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn.