Question: What is the rank of the incumbent that RJ Harris challenged in 2010?

<P0-S0> Field Marshal Gardihewa Sarath Chandralal Fonseka, RWP, RSP, VSV, USP, MP, rcds, psc (Sarath Fonseka) (Sinhalese: ෆීල්ඩ් මාෂල් සරත් ෆොන්සේකා , Tamil: பீல்ட் மார்ஷல் சரத் பொன்சேகா , born 18 December 1950) is a Sri Lanka's highest rank soldier and politician who was the first Sri Lankan Army officer to be promoted to the rank of Field Marshal. <P0-S1>  He was the eighteenth Commander of Sri Lankan Army, and under his command the Sri Lankan Army ended the 26-year Sri Lankan Civil War in 2009, defeating the rebel Liberation Tigers of Tamil Eelam; he thereafter briefly served as the Chief of Defence Staff. <P0-S2>  After retiring from the Army with the rank of General, he entered politics as the common opposition candidate in the 2010 presidential election contesting against President Mahinda Rajapaksa. <P0-S3>  Following his controversial defeat in the presidential election he was elected to Parliament in the general election that followed. <P0-S4>  Soon after he was made a political prisoner and lost his parliamentary seat. <P0-S5>  Fonseka supported Maithripala Sirisena in the 2015 presidential election and following his victory, the newly appointed President Sirisena gave Fonseka a full pardon reinstating his civic rights, military rank and decorations. <P0-S6>  Later he was promoted to the newly created rank of Field Marshal on 22 March 2015. <P0-S7>  On 9 February 2016 he was appointed to Parliament, and he was appointed Cabinet Minister for Regional Development on 25 February 2016. <SEP> <P1-S0> Thomas Jeffery Cole (born April 28, 1949) is the U.S. Representative for Oklahoma 's 4 congressional district , serving since 2003. <P1-S1>  He is a member of the Republican Party. <P1-S2>  He is a Deputy Majority Whip. <P1-S3>  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). <P1-S4>  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. <SEP> <P2-S0> Stayce D. Harris is a United States Air Force Lieutenant General. <P2-S1>  She currently serves as the Assistant Vice Chief of Staff and Director, Air Staff, Headquarters, United States Air Force. <P2-S2>  She also serves as Deputy Chairman of the Air Force Council, and is the Air Force accreditation official for the international Corps of Air Attachés. Harris' promotion is a first for African-American females, as she is the first to hold the three-star rank in the Air Force. <P2-S3>  Additionally, she is the first Air Force Reservist to be promoted to the three-star rank other than the Commander, Air Force Reserve Command. <P2-S4>  Prior to her current assignment Harris was Commander, Twenty-Second Air Force. <SEP> <P3-S0> 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. <P3-S1>  He was a candidate for the Libertarian Party's 2012 nomination for President of the United States. <P3-S2>  He ran as an independent candidate for the same congressional seat in 2012. <P3-S3>  In 2010, he unsuccessfully challenged incumbent Tom Cole for the Republican Party nomination in the primary election for Oklahoma's 4th congressional district.