Question: Harrods Creek, Louisville merged with what most populous county in Kentucky in 2003?

full_context: Document 1: Jefferson County, Kentucky: Jefferson County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 741,096. It is the most populous county in Kentucky and is more than twice as large as the second most populous, Fayette. The county was formed in 1780 and named for future President Thomas Jefferson, who was Governor of Virginia at the time.
Document 2: List of counties in Kentucky: This is a list of the one hundred and twenty counties in the U.S. state of Kentucky. Despite ranking 37th in size by area, Kentucky has 120 counties; depending on definitions, this is either third or fourth among U.S. states. Texas has 254 counties and Georgia 159; Virginia has only 95 counties, but also has 38 independent cities that are not part of any county and deal directly with the state government, giving that state 133 county-level administrative units. The original motivation for having so many counties was to ensure that residents in the days of poor roads and horseback travel could make a round trip from their home to the county seat and back in a single day, as well as being able to travel from one county seat to the next in the same fashion. Later, however, politics began to play a part, with citizens who disagreed with the present county government simply petitioning the state to create a new county. The 1891 Kentucky Constitution placed stricter limits on county creation, stipulating that a new county:
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: Henry County, Kentucky: Henry County is a county located in the U.S. state of Kentucky bordering the Kentucky River. As of the 2010 census, the population was 15,416. Its county seat is New Castle, but its largest city is Eminence. The county was founded in 1798 from portions of Shelby County. It was named for the statesman and governor of Virginia Patrick Henry.
Document 5: Greenup County, Kentucky: Greenup County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 36,910. The county was founded in 1803 and named in honor of Christopher Greenup. Its county seat is Greenup.
Document 6: Louisville, Harrods Creek and Westport: The Louisville, Harrods Creek and Westport (LCH&W) may refer to either of:
Document 7: Wolf Creek, Louisville: Wolf Creek is a neighborhood in far eastern Jefferson County, Kentucky, United States. Located directly east of Louisville along the Ohio River, Wolf Creek is bordered by Harrods Creek, Green Spring and Little Goose Creek. Its zip code is 40241. The neighborhood is quietly nestled amongst rolling hills and features heavy tree density, many small tributaries and natural wildlife.
Document 8: Shelby County, Kentucky: Shelby County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 42,074. The county seat is Shelbyville. The county was founded in 1792 and named for Isaac Shelby, the first Governor of Kentucky.
Document 9: 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 10: Louisville, Harrods Creek and Westport Railway: The Louisville, Harrods Creek and Westport Railway was a 19th-century railway company in the U.S. state of Kentucky. Its first president was James Callahan. It was organized by Louisvillian businessmen in 1870, began construction and operation of the narrow gauge railway in 1872, and failed in 1879 owing the era's Long Depression. The line then gave up hope of connecting to Westport or beyond and reincorporated as the more modest Louisville, Harrods Creek and Westport Rail"road", which simply continued service along the existing track.
Document 11: Harrods Creek, Louisville: Harrods Creek is a neighborhood of Louisville, Kentucky centered near Harrods Creek at the intersection of River Road and Wolf Pen Branch Road. It is roughly bordered by the Ohio River to the west and US 42 to the east. Its ZIP code is 40027. Formerly an unincorporated community, it was designated a neighborhood of Louisville when the city merged with Jefferson County in 2003.
Document 12: Downtown Louisville: Downtown Louisville is the largest central business district in the Commonwealth of Kentucky and the urban hub of the Louisville, Kentucky Metropolitan Area. Its boundaries are the Ohio River to the north, Hancock Street to the east, York and Jacob Streets to the south, and 9th Street to the west. As of 2000, the population of Downtown Louisville was 2,575.
Document 13: 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 14: Griffytown, Louisville: Griffytown is a neighborhood of Louisville, Kentucky located in unincorporated Jefferson County, along Old Harrods Creek Road. Streets within its boundaries include: Bellewood Road, Robert Road, Church Lane, Lincoln Way, Cox Lane, Malcolm Avenue, Plainview Avenue and Booker Road. In 1879, a freed slave named Dan Griffith, an African American, purchased the land he had been living on in the area and the neighborhood appears to be named for him. The neighborhood was redeveloped in the 1970s through urban renewal and remains predominantly African American, although a number of families of other races live there as well.
Document 15: Louisville, Harrods Creek and Westport Railroad: The Louisville, Harrods Creek and Westport Railroad was a 19th-century railway company in the U.S. state of Kentucky. It was formed from the failed Louisville, Harrods Creek and Westport Rail"way" in 1879, gave up its predecessor's hope of reaching Westport or beyond, and simply continued service along the existing narrow gauge railway line between Fulton Street and Harrods Creek until the company's 1881 purchase by the Louisville and Nashville Railroad.
ground_truth: Jefferson County