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"?

Context paragraphs:
Super Hits (Blood, Sweat &amp; Tears album): Super Hits is a budget compilation album by the band Blood, Sweat & Tears released by Columbia Records in 1998.  This ten song collection draws four songs from each of the band's first two albums "Child Is Father to the Man" and "Blood, Sweat & Tears".

Jury Team: The Jury Team was a British political campaign established in 2009 to back independent candidates in United Kingdom domestic and European elections.  Although it was a registered UK political party, it was described as an umbrella organisation giving financial and marketing backing to independent candidates, who were free to set their own political agenda outside of the traditional model of standing as the candidate of a particular party.  Jury Team employed a novel selection process for its independent candidates, allowing any member of the public to apply to be promoted for backing, and leaving final candidate selection to the public, by text message voting.  After contesting the European Parliament elections in June 2009, the Jury Team's first Independent United Kingdom parliamentary candidate was John Smeaton, who stood in the 2009 Glasgow North East by-election.

Left Alternative: Left Alternative was a UK political party resulting from the split within Respect – The Unity Coalition in late 2007.

Noah S. Sweat: Judge Noah S. "Soggy" Sweat, Jr. (October 2, 1922February 23, 1996) was a judge, law professor, and state representative in the U.S. state of Mississippi, notable for his 1952 speech on the floor of the Mississippi state legislature concerning whiskey.  Reportedly the speech took Sweat two and a half months to write.  The speech is renowned for the grand rhetorical terms in which it seems to come down firmly and decisively on both sides of the question.  The speech gave rise to the phrase if-by-whiskey, used to illustrate such equivocation in argument.

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.

Parliamentary Jazz Awards: The Parliamentary Jazz Awards in the United Kingdom are organised by the All Party Parliamentary Jazz Appreciation Group at the Houses of Parliament in London.  The group consists of over a hundred members drawn from across the UK political parties.  The awards were the brainchild Bob Blizzard [Waveney MP] a long time enthusiast of the jazz genre who was concerned that there was a lack of national recognition for the work of jazz performers and venues across the UK.  Bob was involved with organising and running the awards for 11 years.  Also supporting the awards are Jazz Services, Jazz UK, Jazzwise, the UK Musicians' Union jazz section, and PPL.

Winston Churchill: Sir Winston Leonard Spencer-Churchill, {'1': ", '2': ", '3': ", '4': "} (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.  As a Member of Parliament (MP), he represented five constituencies over the course of his career.  As Prime Minister, Churchill led Britain to victory during World War II.  He led the Conservative Party for fifteen years from 1940 to 1955.

Respect Renewal: Respect Renewal was a faction that existed during the 2007-8 split within Respect – The Unity Coalition a UK political party.

We shall fight on the beaches: "We shall fight on the beaches" is a common title given to a speech delivered by Winston Churchill to the House of Commons of the Parliament of the United Kingdom on 4 June 1940.  This was the second of three major speeches given around the period of the Battle of France, with the others designated as the "Blood, toil, tears, and sweat" speech of 13 May, and the "This was their finest hour" speech of 18 June.  Events developed dramatically over the five-week period, and although broadly similar in themes, each speech addressed a different military and diplomatic context.

The History of British Political Parties: The History of British Political Parties, also referred to as Politico's Guide to the History of British Political Parties, is a reference book about political parties in the United Kingdom.  Written by David Boothroyd, it was published in 2001 by Politico's Publishing Ltd and distributed in the United States by International Specialized Book Services (ISBS).  At the time of the book's publication, Boothroyd worked as a researcher with Parliamentary Monitoring Services.  The book contains entries on over 250 UK political parties that have participated in parliamentary elections.  It is structured alphabetically by entry, with the size of each entry relative to the history and influence of the individual political party.  Boothroyd includes information about the history and election statistics of each party, as well as a brief narrative.  He focuses on the Conservative, Liberal, and Labour parties; the parties with the most significant histories in British politics.

Supporting paragraphs: Blood, toil, tears, and sweat Winston Churchill
Answer: Conservative Party