<human>:  When did the Cultural Revolution start and when did it end?
<bot>: The Cultural Revolution started in 1966 and ended in 1976. It was a political movement that began in China and spread to other countries. It was led by Mao Zedong, who was the head of the Communist Party of China at the time. It was a period of time when the government encouraged people to become involved in politics and to protest against the government.