Complex sentence: Sir Winston Leonard Spencer-Churchill, (30 November 187424 January 1965) was a British politician, army officer, and writer, who served as the Prime Minister of the United Kingdom from 1940 to 1945 and from 1951 to 1955.
Split into simpler sentences: Sir Winston Leonard Spencer-Churchill, (30 November 187424 January 1965) was a British statesman, army officer, and writer. He served as Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955.