Question: Which county shares a border with the county where Poplar Hills is located?

full_context: Document 1: Cape Alava: Cape Alava, in Clallam County, Washington, U.S., is the westernmost point in the contiguous 48 states. The westernmost point is located in Olympic National Park and the Makah Indian Reservation.
Document 2: Poplar Hills, Kentucky: Poplar Hills is a home rule-class city in Jefferson County, Kentucky, United States. A part of the Louisville Metro government, it is Kentucky's only city with a majority African-American population. The population was 362 at the 2010 census. It currently has the highest population density for any city in Kentucky, and is the only Kentucky city that is on the highest population densities of American cities list. It currently ranks 19th on the list, and has the second-lowest population for any city on that list. It is tied with Mobile City, Texas, as the smallest city by total area on the list.
Document 3: Point No Point: Point No Point is an outcropping of land on the northeast point of the Kitsap Peninsula in Washington, the United States. It was the location of the signing of the Point No Point Treaty and is the site of the Point No Point Light. It was named by Charles Wilkes during the United States Exploring Expedition of Puget Sound in 1841.
Document 4: Agnew, Washington: Agnew is an unincorporated community in Clallam County, Washington, United States. It lies on a backroad leading to Port Angeles and just outside Sequim. Agnew is a primarily rural residential area located along the Strait of Juan de Fuca.
Document 5: Miller Peninsula: The Miller Peninsula is a small peninsula in Clallam County, Washington and Jefferson County, Washington surrounded by Discovery Bay on the east, the Strait of Juan de Fuca to the north, and Sequim Bay to the west. Small residential communities on the peninsula include Blyn, at the southwest corner; Diamond Point, on the northeast corner; Gardiner, midway down the eastern shore; and Discovery Bay at the foot. See Discovery Bay, Washington for additional detail on placenames in the area.
Document 6: List of U.S. cities with large African-American populations: Top Ten cities with 100,000 or more total population and the highest percentages of Blacks or African - Americans, alone or with other races City Total Population Black or African American, alone or with other races Black or African American, alone Mixed - race Black / African - American Rank Percentage of total population Rank Percentage of total population Rank Percentage of total population Detroit, MI 713,777 84.3 82.7 83 1.6 Jackson, MS 173,514 80.1 79.4 242 0.7 Miami Gardens, FL 107,167 77.9 76.3 91 1.6 Birmingham, AL 212,237 74.0 73.4 257 0.6 Baltimore, MD 620,961 5 65.1 5 63.7 134 1.3 Memphis, TN 646,889 6 64.1 6 63.3 225 0.8 New Orleans, LA 343,831 7 61.2 7 60.2 184 1.0 Flint, MI 102,434 8 59.5 9 56.6 9 2.9 Montgomery, AL 205,764 9 57.4 8 56.6 231 0.8 Savannah, GA 136,286 10 56.7 10 55.4 139 1.3
Document 7: Mount Washington, Kentucky: Mount Washington is a home rule-class city in northeast Bullitt County, Kentucky, in the United States. The population was 9,117 at the 2010 census. The city is one of several surrounding Louisville that have experienced a sharp rise in population in the past three decades, becoming a commuter town.
Document 8: Highview, Louisville: Highview is a former census-designated place in Jefferson County, Kentucky, United States. The population was 15,161 at the 2000 census. On January 6, 2003, the area was annexed to the city of Louisville due to a merger between the city and Jefferson County's unincorporated communities. Highview is now a neighborhood within the city limits of Louisville.
Document 9: Blaine, Washington: Blaine is a city in Whatcom County, Washington, United States. The city's northern boundary is the Canada–US border. The Peace Arch international monument lies partly in Blaine and partly in Canada. The population was 4,684 at the 2010 census. Since Blaine is located right on the border with Canada, it is the northernmost city on Interstate 5, while the southernmost city is San Ysidro, California.
Document 10: New York City: In 2014, the city had an estimated population density of 27,858 people per square mile (10,756/km²), rendering it the most densely populated of all municipalities housing over 100,000 residents in the United States; however, several small cities (of fewer than 100,000) in adjacent Hudson County, New Jersey are more dense overall, as per the 2000 Census. Geographically co-extensive with New York County, the borough of Manhattan's population density of 71,672 people per square mile (27,673/km²) makes it the highest of any county in the United States and higher than the density of any individual American city.
Document 11: Miller, California: Miller is a former settlement in Marin County, California. It was located on the Northwestern Pacific Railroad south-southeast of downtown Novato, at an elevation of 23 feet (7 m). Miller still appeared on maps as of 1914.
Document 12: History of Louisville, Kentucky: Following the 1850 Census, Louisville was reported as the nation's tenth largest city, while Kentucky was reported as the eighth most populous state.
Document 13: Seattle: Seattle is located between the saltwater Puget Sound (an arm of the Pacific Ocean) to the west and Lake Washington to the east. The city's chief harbor, Elliott Bay, is part of Puget Sound, which makes the city an oceanic port. To the west, beyond Puget Sound, are the Kitsap Peninsula and Olympic Mountains on the Olympic Peninsula; to the east, beyond Lake Washington and the eastside suburbs, are Lake Sammamish and the Cascade Range. Lake Washington's waters flow to Puget Sound through the Lake Washington Ship Canal (consisting of two man-made canals, Lake Union, and the Hiram M. Chittenden Locks at Salmon Bay, ending in Shilshole Bay on Puget Sound).
Document 14: List of U.S. cities with large African-American populations: Ten cities with 100,000 or more total population and the highest number of Blacks or African Americans City Total population Black or African American, alone or mixed with other races Black or African American, alone Mixed - race Black / African - American Rank Number Rank Number Rank Number New York, NY 8,175,133 2,228,145 2,088,510 139,635 Chicago, IL 2,695,598 913,009 887,608 25,401 Philadelphia, PA 1,526,006 686,870 661,839 25,031 Detroit, MI 713,777 601,988 590,226 13 11,762 Houston, TX 2,099,451 5 594,217 5 498,466 8 11,751 Memphis, TN 646,889 6 414,928 6 409,687 58 5,241 Baltimore, MD 620,961 7 403,998 7 395,781 29 8,217 Los Angeles, CA 3,792,621 8 402,448 8 365,118 37,330 Washington, DC 601,723 9 314,352 9 305,125 22 9,227 Dallas, TX 1,197,816 10 308,087 10 298,993 23 9,094
Document 15: Richmond, Virginia: By the beginning of the 20th century, the city's population had reached 85,050 in 5 square miles (13 km2), making it the most densely populated city in the Southern United States. In 1900, the Census Bureau reported Richmond's population as 62.1% white and 37.9% black. Freed slaves and their descendants created a thriving African-American business community, and the city's historic Jackson Ward became known as the "Wall Street of Black America." In 1903, African-American businesswoman and financier Maggie L. Walker chartered St. Luke Penny Savings Bank, and served as its first president, as well as the first female bank president in the United States. Today, the bank is called the Consolidated Bank and Trust Company, and it is the oldest surviving African-American bank in the U.S. Other figures from this time included John Mitchell, Jr. In 1910, the former city of Manchester was consolidated with the city of Richmond, and in 1914, the city annexed Barton Heights, Ginter Park, and Highland Park areas of Henrico County. In May 1914, Richmond became the headquarters of the Fifth District of the Federal Reserve Bank.
ground_truth: Clallam County
sub_queries: Poplar Hills >> located in the administrative territorial entity Answer: Jefferson County
Jefferson County >> shares border with Answer: Clallam County