Shanghai is a series of action comedy films based on the characters written by Alfred Gough and Miles Millar. The series includes: "Shanghai Noon" (2000), "Shanghai Knights" (2003), and the upcoming "Shanghai Dawn" (TBA). It stars Jackie Chan and Owen Wilson as the Chinese Imperial guard Chon Wang and the American bandit Roy O'Bannon. The series combined has grossed over $187 million. Using only the above description and what you know about the world, "Shanghai Noon and Shanghai Knights were released three years apart." is definitely correct, incorrect, or inconclusive? 