Question: What UK political party was led for fifteen years by the man who gave the speech containing the phrase "blood, toil, tears and sweat"?
Sentence (from "Blood, toil, tears, and sweat"): The phrase "blood, toil, tears and sweat" became famous in a speech given by Winston Churchill to the House of Commons of the Parliament of the United Kingdom on 13 May 1940.
Relevant evidence: Yes