Question: How many years did the winner of the United Kingdom general election in 1955 serve?
Sentence (from "Anthony Eden"): Robert Anthony Eden, 1st Earl of Avon, (12 June 1897 – 14 January 1977) was a British Conservative politician who served three periods as Foreign Secretary and then a relatively brief term as Prime Minister of the United Kingdom from 1955 to 1957.
Relevant evidence: Yes