Question: What is the date of birth of the person who was unsuccessfully challenged by R. J. Harris in 2010?

Context paragraphs:
Morgentaler v R: Morgentaler v R (also known as "Morgentaler v The Queen") is a decision of the Supreme Court of Canada where physician Henry Morgentaler unsuccessfully challenged the prohibition of abortion in Canada under the Criminal Code.  The Court found the abortion law was appropriately passed by Parliament under the laws of federalism.  This was the first of three Supreme Court decisions on abortion that were brought by Morgentaler.

Mike Huckleberry: Michael "Huck" Huckleberry (born July 12, 1948) is a politician, restaurateur, and small business owner from Greenville, Michigan.  In 2008, he was elected as a Democrat to the Michigan State House of Representatives.  He represented the 70th House District, which includes all of Montcalm County and a portion of North-west Ionia County including the city of Ionia.  In 2006 he unsuccessfully challenged incumbent Republican Congressman Dave Camp, who represents Michigan's 4th congressional district, located in central Michigan.  In 2010 he was defeated by Rick Outman, 55%-43%.

Lavu Narendranath: Lavu Narendranath is an Indian orthopedic surgeon, medical researcher and the director of Nizam's Institute of Medical Sciences, Hyderabad.  After graduating in medicine and securing a master's degree (MS), he joined NIMS and worked there till his superannuation as Associate Dean on 31 August 2013, but was asked to continue as the director of the institution.  His appointment was unsuccessfully challenged in court but he has been serving the institution since then and major developments are reported during his tenure.  He has worked along with A. P. J. Abdul Kalam, renowned scientist and former President of India, in a project for the development of ultra low weight prosthetic limbs for polio-affected persons and amputees.  The Government of India awarded him the fourth highest civilian honour of the Padma Shri, in 2005, for his contributions to Indian medicine.

Theresa Oswald: Theresa Oswald, is a politician in Manitoba, Canada.  She was a New Democratic Party member of the Legislative Assembly of Manitoba from 2003 to 2016 and a cabinet minister from 2004 until she stepped down in 2014 to unsuccessfully challenged Premier Greg Selinger for the party's leadership.

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).

Randolph W. Thrower: Randolph William Thrower (September 5, 1913 – March 8, 2014) was a partner at Sutherland Asbill & Brennan LLP, a law firm with principal offices in Atlanta, Georgia and Washington, D.C. He was born in Tampa, Florida.  Thrower, running as a Republican, unsuccessfully challenged incumbent segregationist James C. Davis for a seat in Congress in 1956.  He later served as Commissioner of Internal Revenue under President Richard Nixon from 1969 to 1971, when he was fired by John D. Ehrlichman "for resisting White House efforts to punish its enemies through tax audits" and as chairman of the City of Atlanta's Board of Ethics from 1980 to 1992.  In 1993, Thrower received the American Bar Association Medal, the ABA's highest honor, for his public, professional, and government service.  He was the recipient in 1995 of the Court of Federal Claims Special Service Award and received the Tax Section's Distinguished Service Award for 1996.  In 1992 he received the Leadership Award of the Atlanta Bar Association and more recently the Segal-Tweed Founders Award of the Lawyers' Committee for Civil Rights Under Law.

Filip Verlinden: Filip Verlinden (born December 26, 1982) is a Belgian kickboxer who competes in the cruiserweight and heavyweight divisions.  Verlinden was introduced to the sport at an early age and came to prominence in 2008 when he won the WKA European Super Cruiserweight Muay Thai Championship, followed by the WKA World Cruiserweight title the following year.  He then took the gold medal at the 2010 IFMA World Championships in the +91 kg/200 lb division as an amateur before a short stint in the It's Showtime promotion where he unsuccessfully challenged Danyo Ilunga for the It's Showtime 95MAX Championship in June 2012.  Later that year, he joined Glory.

Mark M. Gillen: Mark M. Gillen (born November 6, 1955) is an American politician and member of the Republican Party.  In 2010, he was elected to represent the 128th District in the Pennsylvania House of Representatives.  The seat had been vacated by Republican Sam Rohrer, who had unsuccessfully challenged State Attorney General Tom Corbett in the May 2010 Republican gubernatorial primary.  Gillen is currently serving on the Aging and Older Adult Services, Education, Labor and Industry, and Veterans Affairs and Emergency Preparedness committees.

IWC meeting in 2006: The International Whaling Commission meeting in 2006 was held 16 June–20 June in St Kitts and Nevis.  Pro whaling countries unsuccessfully challenged the 1982 moratorium, yet succeeded in shifting the IWC focus from whale conservation to management of commercial whaling.

R. J. Harris: Richard Jason Satawk "R. J." Harris (born November 16, 1972) is a United States Army National Guard warrant officer, politician, law student and former Air Traffic Controller.  He was a candidate for the Libertarian Party's 2012 nomination for President of the United States.  In 2010, he unsuccessfully challenged incumbent Tom Cole for the Republican Party nomination in the primary election for Oklahoma's 4th congressional district.  He ran as an independent candidate for the same congressional seat in 2012.

Supporting paragraphs: R. J. Harris Tom Cole
Answer: April 28, 1949