Answer
Five governments were led by Mariano Rumor, an Italian politician who served as the 29th prime minister of Italy from 1968 to 1974. His tenure was characterized by political instability and a series of crises, including the 1969 Piazza Fontana bombing and the 1973 oil crisis. Rumor's governments implemented various social reforms, including the introduction of a national health service and the expansion of workers' rights.