Question: Reginald Fletcher was minister of Civil Aviation under what British Labour politician who served as prime minister of the United Kingdom from 1945 to when?
Sentence (from "Clement Attlee"): Clement Richard Attlee, 1st Earl Attlee, {'1': ", '2': ", '3': ", '4': "} (3 January 1883 – 8 October 1967) was a British Labour politician who served as Prime Minister of the United Kingdom from 1945 to 1951 and Leader of the Labour Party from 1935 to 1955.
Relevant evidence: Yes