Suppose The Great Gatsby is a 1925 novel by American author F. Scott Fitzgerald that follows a cast of characters living in the fictional towns of West Egg and East Egg on prosperous Long Island in the summer of 1922. The story explores themes of decadence, idealism, resistance to change, social upheaval, and excess.
Can we infer that "The novel is set in the 19th century."? Yes, no, or maybe?