Question: Who served as a congressman for the the district which contains the cities of Lexington (including its suburbs), Richmond, and Frankfort, the state capital?

full_context: Document 1: Kentucky: Kentucky ( , ), officially the Commonwealth of Kentucky, is a state located in the east south-central region of the United States. Although styled as the "State of Kentucky" in the law creating it, Kentucky is one of four U.S. states constituted as a commonwealth (the others being Virginia, Pennsylvania, and Massachusetts). Originally a part of Virginia, in 1792 Kentucky became the 15th state to join the Union. Kentucky is the 37th most extensive and the 26th most populous of the 50 United States.
Document 2: Happy Chandler: Albert Benjamin "Happy" Chandler Sr. (July 14, 1898June 15, 1991) was an American politician from the U.S. state of Kentucky. He represented the Commonwealth in the U.S. Senate and served as its 44th and 49th governor. Aside from his political positions, he also served as the second Commissioner of Baseball from 1945 to 1951 and was inducted into the Baseball Hall of Fame in 1982. His grandson, Ben Chandler, later served as congressman for Kentucky's Sixth District.
Document 3: Georgetown, Kentucky: Georgetown is a home rule-class city in Scott County, Kentucky, in the United States. The 2016 population was 33,440 per the United States Census Bureau. It is the 7th-largest city by population in the U.S. state of Kentucky. It is the seat of its county. It was originally called Lebanon when founded by Rev. Elijah Craig and was renamed in 1790 in honor of President George Washington.<ref name="History of Georgetown/Scott County"> </ref> It is the home of Georgetown College, a private liberal arts college. Georgetown is part of the Lexington-Fayette, KY Metropolitan Statistical Area.
Document 4: Interstate 64 in Kentucky: In the U.S. state of Kentucky, Interstate 64 travels for 191 mi passing by the major towns and cities of Louisville, Frankfort, Lexington and Ashland. It has several major junctions within the state: Interstate 65, Interstate 71, Interstate 264 and Interstate 265 in Louisville, and Interstate 75 in Lexington.
Document 5: Robert Byrd: Robert Carlyle Byrd (born Cornelius Calvin Sale Jr.; November 20, 1917June 28, 2010) was a United States Senator from West Virginia. A member of the Democratic Party, Byrd served as a U.S. Representative from 1953 until 1959 and as a U.S. Senator from 1959 to 2010. He was the longest-serving Senator in United States history. In addition, he was, at the time of his death, the longest-serving member in the history of the United States Congress, a record later surpassed by Representative John Dingell of Michigan. Byrd was the last remaining member of the U.S. Senate to have served during the presidency of Dwight Eisenhower, and the last remaining member of Congress to have served during the presidency of Harry Truman. Byrd is also the only West Virginian to have served in both houses of the state legislature and both houses of Congress.
Document 6: Louisville, Kentucky: Louisville ( , or ) is the largest city in the Commonwealth of Kentucky and the 29th-most populous city in the United States. It is one of two cities in Kentucky designated as first-class, the other being the state's second-largest city of Lexington. Louisville is the historical seat and, since 2003, the nominal seat of Jefferson County.
Document 7: Benjamin Hardin Helm: Benjamin Hardin Helm (June 2, 1831 – September 21, 1863) was a Kentucky politician, attorney, Confederate brigadier general, and a brother-in-law of Abraham Lincoln. He was also the son of Kentucky Governor John L. Helm. Helm was born in Bardstown, Kentucky. He attended the Kentucky Military Institute and the West Point Military Academy and then went to study law at the University of Louisville and Harvard University. He served as a state legislator and the state's attorney in Kentucky. He also served as the assistant inspector-general for the Kentucky state guard. Helm was offered the position of Union Army paymaster by his brother-in-law, President Abraham Lincoln, a position which he declined. Helm felt it was an honor to serve in the Confederate States Army, where he was initially a colonel and later promoted to brigadier general. Helm commanded the 1st Kentucky Brigade more commonly known as The Orphan Brigade. He died on the battlefield during the Battle of Chickamauga. Helm was married to Emilie Todd, the half-sister of Mary Todd Lincoln.
Document 8: James E Simpson Jr: James Simpson Jr was the first African American to win a city commission election in the history of Covington, KY. Simpson was one of nearly 30 people who filed to run for the City Commission in 1971. He finished third, winning one of four seats and making political history. Simpson served the full two-year term. He later finished an un-expired term on the commission in 1991. Simpson was active in many other civic groups. He served on the following boards: Kenton County Airport Board (8 years - in 1978 he was elected Chairman), People's Liberty Bank Board of Directors, Booth Hospital in Covington, St. Elizabeth Hospital in Covington and the Kenton County TB Sanatorium. Simpson was also one of the founders of the Northern Kentucky Community Center in the Eastside Neighborhood of Covington. James Edward Simpson Jr is father to State Representative Arnold Ray Simpson who serves the 65th district of Kentucky, the first African American to hold this seat at the Kentucky State Assembly.
Document 9: Kentucky's 6th congressional district: Kentucky's 6th congressional district is a congressional district in the U.S. state of Kentucky. Based in Central Kentucky, the district contains the cities of Lexington (including its suburbs), Richmond, and Frankfort, the state capital.
Document 10: Frankfort, Kentucky: Frankfort is the capital city of the Commonwealth of Kentucky and the seat of Franklin County. Based on population, it is the fourth-smallest state capital (after Montpelier, Vermont, Pierre, South Dakota and Augusta, Maine) in the United States. It is a home rule-class city in Kentucky; the population was 25,527 at the 2010 census. Located along the Kentucky River, Frankfort is the principal city of the Frankfort, Kentucky Micropolitan Statistical Area, which includes all of Franklin and Anderson counties.
Document 11: List of places named after Robert Byrd: United States Senator Robert C. Byrd (November 20, 1917 – June 28, 2010) represented the U.S. state of West Virginia as a Democrat in the United States Senate. During his tenure as chairman of the United States Senate Committee on Appropriations, Byrd secured billions of dollars of Federal funds for projects throughout West Virginia, many of which bear his name. Byrd served four terms as Chairman of the Senate Appropriations Committee: January 3, 1989 through January 3, 1995; January 3, 2001 through January 20, 2001; June 6, 2001 through January 3, 2003; and January 3, 2007 through January 3, 2009. As a New Deal Democrat, Byrd used his position as chairman to battle persistent poverty in his home state of West Virginia, which he referred to as “one of the rock bottomest of states.” "I lost no opportunity to promote funding for programs and projects of benefit to the people back home," said Byrd.“ Within two years of his chairmanship, Byrd surpassed his announced five-year goal of making sure more than $1 billion in Federal funds was sent back to West Virginia. In referring to his economic contributions to West Virginia, Byrd said in 2000, "West Virginia has always had four friends: God Almighty, Sears Roebuck, Carter's Liver Pills and Robert C. Byrd."
Document 12: John Sherman Cooper: John Sherman Cooper (August 23, 1901 – February 21, 1991) was a politician, jurist, and diplomat from the U.S. state of Kentucky. He served three non-consecutive, partial terms in the United States Senate before being elected to two full terms in 1960 and 1966. He also served as U.S. Ambassador to India from 1955 to 1956 and U.S. Ambassador to East Germany from 1974 to 1976. He was the first Republican to be popularly elected to more than one term as a senator from Kentucky and, in both 1960 and 1966, he set records for the largest victory margin for a Kentucky senatorial candidate from either party.
Document 13: Kenny Albert: Kenneth "Kenny" Albert (born February 2, 1968) is an American sportscaster, the son of sportscaster Marv Albert and the nephew of sportscasters Al Albert and Steve Albert. He is the only sportscaster who currently does play-by-play for all four major professional sports leagues in the United States and Canada (NFL, NBA, MLB, NHL).
Document 14: Kentucky's 4th congressional district: Kentucky's 4th congressional district is a congressional district in the U.S. state of Kentucky. Located in the northeastern portion of the state, it is a long district that follows the Ohio River. The majority of voters live in the booming suburban Cincinnati counties of Boone, Kenton and Campbell, which includes such suburbs as Fort Mitchell, Covington, Florence, Newport, and Fort Thomas. It also stretches into the outer suburbs of Louisville (including a small portion of Louisville itself) and Lexington.
Document 15: Evansville Evas: The Evansville Evas was a primary nickname of an early minor league baseball team in Evansville, Indiana. Early Evansville teams played in three leagues under a variety of nicknames from 1901–1931. Evansville was without a team until the 1938 Evansville Bees restarted Evansville baseball. Baseball Hall of Fame Inductees Hank Greenberg (1931) and Chuck Klein (1927) and Edd Roush (1912–1913) played for Evansville during the early era, joining Warren Spahn as Evansville alumni in the Hall of Fame. Beginning in 1915, Evansville played home games at Bosse Field, which is the third oldest baseball stadium in the United States, still in use today by the Evansville Otters of the Frontier League.
ground_truth: Ben Chandler