Quiz shows are television or radio programs that involve individuals or teams competing through demonstrating general knowledge or knowledge of specific topics. They typically follow a consistent format of rounds and rules. Popular subgenres include shows focused on specific topics like Shakespeare, gardening, or celebrities. While many quiz shows test factual knowledge, some hybridize with game shows by testing skills instead of or in addition to knowledge. The longest running UK quiz show is A Question of Sport, which began airing in 1970.