Question: Which county shares a border with the county in which Union Township is located?

full_context: Document 1: Washington Township, Clinton County, Ohio: Washington Township is one of the thirteen townships of Clinton County, Ohio, United States. The population as of the 2010 census was 2,130, up from 1,895 in 2000 and 1,475 in 1990.
Document 2: Clinton County Courthouse (Ohio): The Clinton County Courthouse is located at 53 East Main Street in Wilmington, Ohio. The courthouse is included in the Wilmington Commercial Historic District which was added to the National Register on 1982-10-14.
Document 3: Marshall Otis Howe: Marshall Otis Howe (October 4, 1832 – May 13, 1919) was a farmer, school superintendent and Justice of the Peace from Newfane, Vermont and member of the Vermont House of Representatives, serving in 1882.
Document 4: N. Monroe Marshall: Nathaniel Monroe Marshall (June 13, 1854 Schuyler Falls, Clinton County, New York – February 16, 1935 Malone, Franklin County, New York) was an American banker and politician.
Document 5: Herbert M. Merrill: Herbert M. Merrill (September 13, 1871 in Campton, Grafton County, New Hampshire – March 5, 1956 in Schenectady, New York) was an American politician from New York. He was the first Socialist member of the New York State Assembly.
Document 6: Marshall Monroe Kirkman: Marshall Monroe Kirkman (July 10, 1842 – April 17, 1921) was an American authority on railways, who wrote extensively on the subject of railways.
Document 7: John Marshall: John Marshall (September 24, 1755 -- July 6, 1835) was an American politician and the fourth Chief Justice of the United States (1801 -- 1835). His court opinions helped lay the basis for United States constitutional law and many say he made the Supreme Court of the United States a coequal branch of government along with the legislative and executive branches. Previously, Marshall had been a leader of the Federalist Party in Virginia and served in the United States House of Representatives from 1799 to 1800. He was Secretary of State under President John Adams from 1800 to 1801 and, at the age of 45, became the last of the chief justices to be born in Colonial America.
Document 8: Union Township, Howard County, Indiana: Union Township is one of eleven townships in Howard County, Indiana, United States. As of the 2010 census, its population was 1,029 and it contained 419 housing units.
Document 9: Union Township, Champaign County, Ohio: Union Township is one of the twelve townships of Champaign County, Ohio, United States. The 2010 census reported 2,210 people living in the township, 2,106 of whom lived in the unincorporated portions of the township.
Document 10: John Marshall: John Marshall (September 24, 1755 -- July 6, 1835) was an American politician. He was the fourth Chief Justice of the United States (1801 -- 1835). His court opinions helped lay the basis for United States constitutional law and many say he made the Supreme Court of the United States a coequal branch of government along with the legislative and executive branches. Previously, Marshall had been a leader of the Federalist Party in Virginia and served in the United States House of Representatives from 1799 to 1800. He was Secretary of State under President John Adams from 1800 to 1801 and, at the age of 45, became the last of the chief justices to be born in Colonial America.
Document 11: Union Township, Clinton County, Ohio: Union Township is one of the thirteen townships of Clinton County, Ohio, United States. The 2010 United States Census reported 3,085 people living in the township. The township surrounds the city of Wilmington, the Clinton County seat. Previous censuses recorded the population of Wilmington as within Union Township, and thus the township population was 14,929 at the 2000 census. The population of 3,008 living in the unincorporated portions of the township in 2000 is comparable to the 2010 entire township population.
Document 12: Mordecai Puryear House: The Mordecai Puryear House is a center-hall house in Franklin, Tennessee, United States, built around 1830. Mordecai Puryear was one of the ten original investors in the National Bank of Franklin in 1871. The bank "was one of the primary financial institutions of the county" until it failed in 1926.
Document 13: Union Township, Clermont County, Ohio: Union Township is one of the fourteen townships of Clermont County, Ohio, United States. The township population was 46,416 at the 2010 census.
Document 14: James Monk: James Monk was born in 1745 at Boston, Massachusetts, and christened at King's Chapel. He was the son of Judge James Monk (1717-1768) of Halifax, Nova Scotia and his wife Ann, daughter of Henry Deering of Boston. Sir James Monk was a grandson of George Monk (b.1666) of Blatchingley, who was one of the three illegitimate sons of George Monck, 1st Duke of Albemarle. James was educated in Halifax where his father had settled in 1749. He studied law with his father from 1761 to 1767 and was admitted to the bar in 1768. After his father died leaving the family in debt, Monk took over the family's finances. In 1771, he studied law in London and on the recommendation of Lord Hillsborough he was appointed Solicitor-General of Nova Scotia in 1772, while continuing his law studies in London. In 1774, he married Ann Elizabeth Adams of St James's Street, London, who was said to be 'well connected'.
Document 15: Union Township, Lawrence County, Ohio: Union Township is one of the fourteen townships of Lawrence County, Ohio, United States. The 2000 census recorded 9,002 people in the township, 7,540 of whom lived in the unincorporated portions of the township.
ground_truth: Franklin County
sub_queries: Union Township >> located in the administrative territorial entity Answer: Clinton County
Clinton County >> shares border with Answer: Franklin County