Question: What party is Sarah Coburn's father a member of?

full_context: Document 1: Sonya Yoncheva: Sonya Yoncheva (Bulgarian: Соня Йончева, born 25 December 1981) is a Bulgarian operatic soprano.
Document 2: Jennifer Wilson: Jennifer Wilson (born 1966, Fairfax, Virginia, USA) is an American soprano known especially for her Wagnerian opera roles. She is the daughter of Newton Wilson (son of the late Frontier Airlines co-founder Raymond Wilson) and Katherine Still. The daughter, granddaughter and niece of professional singers, instrumentalists and music educators, Wilson grew up steeped in music from opera and oratorio to rock 'n' roll and bluegrass. She began tap dance lessons at age 3, ballet at 8, piano at 10, and solo classical singing at 12. Wilson attended Cornell University for several years, eventually departing on a leave of absence which she filled with advanced training in acting, languages, and vocal studies with former Metropolitan Opera coloratura soprano Marilyn Cotlow. During this time, Wilson supported herself as a news bureau assistant and wire editor for Radio Free Europe/Radio Liberty. The consolidation of US international broadcast services in 1995 caused Wilson to lose her position with RFE/RL, forcing her to find other employment. At this point she took up singing full-time, though her breakthrough to the elusive ranks of international soloist was still several years away.
Document 3: Tom Coburn: Thomas Allen "Tom" Coburn (born March 14, 1948) is an American politician and medical doctor. A member of the Republican Party, he was the junior United States Senator from Oklahoma.
Document 4: Candy Coburn: Candy Coburn is an American national performing country music artist who has shared the stage with many notable artists, including Brooks and Dunn, Kellie Pickler, Montgomery Gentry, Blake Shelton, Miranda Lambert, Gary Allan, Josh Turner, Lady Antebellum and others. Scheduled to release her third album in 2010, Candy's most notable contribution to music so far has been her song, "Pink Warrior."
Document 5: John Cornyn: John Cornyn III (born February 2, 1952) is an American politician, lawyer and the senior United States Senator from Texas, serving since 2002. He is a member of the Republican Party and the current Senate Majority Whip for the 115th Congress. Cornyn previously served as Chairman of the National Republican Senatorial Committee from 2007 to 2011.
Document 6: Tom Price (American politician): Thomas Edmunds Price (born October 8, 1954) is an American physician and politician, who served as the United States Secretary of Health and Human Services in the administration of Donald Trump in 2017, and who was the U.S. Representative for Georgia 's 6 congressional district , encompassing the northern suburbs of Atlanta, from 2005 to 2017.
Document 7: Kathleen Battle: Kathleen Deanna Battle (born August 13, 1948) is an American operatic soprano known for her distinctive vocal range and tone. Born in Portsmouth, Ohio, Battle initially became known for her work within the concert repertoire through performances with major orchestras during the early and mid-1970s. She made her opera debut in 1975. Battle expanded her repertoire into lyric soprano and coloratura soprano roles during the 1980s and early 1990s until her eventual dismissal from the Metropolitan Opera in 1994. After a 22-year absence from the Met, Battle performed a concert of spirituals at the Metropolitan Opera House in November 2016.
Document 8: Jim Inhofe: James Mountain Inhofe ( ; born November 17, 1934) is the senior United States senator from Oklahoma and a member of the Republican Party. First elected to the Senate in 1994, he was the ranking member of the United States Senate Committee on Environment and Public Works (EPW) and was its chairman from 2003 to 2007, and again from January 2015 until January 2017. Inhofe served eight years as the United States representative for 2=nd
Document 9: Thad Cochran: William Thad Cochran (born December 7, 1937) is an American Republican politician. He is the current senior United States Senator from Mississippi (the third most-senior Senator and the second most-senior Republican member), first elected to the Senate in 1978, and the Chairman of the Senate Appropriations Committee, which he had also chaired from 2005 to 2007. He also chaired the Senate Agriculture Committee from 2003 to 2005. Cochran won reelection to a seventh term in 2014, after defeating Chris McDaniel in an intense primary run-off election. He is currently the dean of the Mississippi congressional delegation. He is also on track to become the longest serving Republican Member of Congress if he serves until 2019, surpassing Joseph Gurney Cannon, former Speaker of the House, who served for 46 years.
Document 10: Sarah Coburn: Sarah Coburn is an American operatic soprano (born August 4, 1977) who was born in Petersburg, Virginia and is the daughter of former United States Senator from Oklahoma, Tom Coburn.
Document 11: Tom Cole: Thomas Jeffery Cole (born April 28, 1949) is the U.S. Representative for Oklahoma 's 4 congressional district , serving since 2003. He is a member of the Republican Party. He is a Deputy Majority Whip. The chairman of the National Republican Congressional Committee (NRCC) from 2006 to 2008, he was, during his tenure, the fourth-ranking Republican leader in the House. As of 2015, Cole – a member of the Chickasaw Nation – is one of only two registered Native Americans in Congress (the other being fellow Oklahoman Markwayne Mullin).
Document 12: David L. Boren: David Lyle Boren (born April 21, 1941) is an American university administrator and politician from the state of Oklahoma. A member of the Democratic Party, he served as the 21st governor of Oklahoma from 1975 to 1979 and in the United States Senate from 1979 to 1994. He is currently the 13th president of the University of Oklahoma. He was the longest serving chairman of the Senate Select Committee on Intelligence. David Boren officially announced his retirement as president of the University of Oklahoma, effective June 30, 2018.
Document 13: Sylvia McNair: Sylvia McNair (born June 23, 1956) is an American opera singer and classical recitalist who has also achieved notable success in the Broadway and cabaret genres. McNair, a soprano, has made several critically acclaimed recordings and has won two Grammy Awards.
Document 14: Sarah Beth Goncarova: Sarah Beth Goncarova (born 1980) is an American painter, sculptor, and installation artist known for abstract textile pieces and non-specific figurative scenes. Her works are in several individual, corporate, and public collections.
Document 15: Jerry Moran: Gerald W. Moran (born May 29, 1954) is the junior United States Senator from Kansas and a member of the Republican Party. He served as Chairman of the National Republican Senatorial Committee for the 113th U.S. Congress, during which he led successful Republican efforts in United States Senate elections, 2014, producing the first Republican Senate majority since 2006. Previously, he served as a member of the United States House of Representatives, representing 2=nd
ground_truth: Republican Party