Question: Which county shares border with the county having Plain Township?

full_context: Document 1: Plain Township, Franklin County, Ohio: Plain Township is one of the seventeen townships of Franklin County, Ohio, United States. As of the 2010 census the population was 9,829, up from 5,926 at the 2000 census. 2,128 of the residents lived in the unincorporated portions of the township in 2010.
Document 2: Sharon Township, Franklin County, Ohio: Sharon Township is one of the seventeen townships of Franklin County, Ohio, United States. As of the 2010 census the population was 15,969, of whom 1,849 lived in the unincorporated portions of the township.
Document 3: Franklin Township, Clermont County, Ohio: Franklin Township is one of the fourteen townships of Clermont County, Ohio, United States. The 2010 census reported 4,188 people living in the township, 3,307 of whom lived in the unincorporated portions of the township.
Document 4: 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 5: 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 6: 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 7: 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 8: 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 9: Madison Township, Franklin County, Ohio: Madison Township is one of the seventeen townships of Franklin County, Ohio, United States. The 2010 census found 23,509 people in the township, 10,795 of whom lived in the unincorporated portions of the township.
Document 10: Perry Township, Franklin County, Ohio: Perry Township is one of the seventeen townships of Franklin County, Ohio, United States. The 2010 census found 3,637 people in the township, down from 4,087 in 2000.
Document 11: 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 12: Jefferson Township, Franklin County, Ohio: Jefferson Township is situated on the northeast edge of Franklin County, Ohio as a part of the Columbus metropolitan area and situated between the Blacklick Creek, Big Walnut Creek and Swisher Creek watershed. The township is one of the seventeen townships of Franklin County, Ohio, United States. The 2010 census found 10,972 people in the township, 10,234 of whom lived in the unincorporated portions of the township. It was established on September 6, 1816.
Document 13: 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 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: Franklin Township, Morrow County, Ohio: Franklin Township is one of the sixteen townships of Morrow County, Ohio, United States. The 2010 census found 1,617 people in the township.
ground_truth: Clinton County
sub_queries: Plain Township >> located in the administrative territorial entity Answer: Franklin County
Franklin County >> shares border with Answer: Clinton County