premise: The Amboy Dukes were an American rock band formed in 1964 in Detroit, Michigan, best known for their one hit single "Journey to the Center of the Mind". The band's name comes from the title of a novel by Irving Shulman. In the UK the group's records were released under the name of The American Amboy Dukes because of the existence of a British group with the same name.
hypothesis: Shulman died in 1964
reason: We do not know when Shulman died because it is not mentioned in the article at all