Question: What Michigan county is named after the Vice President of the seventh President of the United States?

full_context: Document 1: Calhoun Mine: The Calhoun Mine is perhaps the oldest and best-known mine in Lumpkin County, Georgia. When gold was discovered in Lumpkin County in 1828, which led to the Georgia Gold Rush in 1829, it was discovered on 239 acre owned by Robert Obar. After at least two intermediary sales, the land was purchased by Senator John C. Calhoun of South Carolina, who was also the 7th Vice President of the United States. Calhoun started a mining company to mine the land and later allowed his son-in-law Thomas Green Clemson, the founder of Clemson University, to manage it. The ore deposit was a very rich deposit and, according to an 1856 letter from Clemson to his brother-in-law, was still producing significant quantities of gold nearly 30 years after its initial discovery on the land. This mine - along with the Consolidated Mine and the Loud Mine - were some of the most productive mines in the Georgia Gold Belt.
Document 2: Andrew Jackson: Andrew Jackson (March 15, 1767 – June 8, 1845) was an American soldier and statesman who served as the seventh President of the United States from 1829 to 1837. Before being elected to the presidency, Jackson gained fame as a general in the United States Army and served in both houses of Congress. As president, Jackson sought to advance the rights of the "common man" against a "corrupt aristocracy" and to preserve the Union.
Document 3: Cuba Plantation: Cuba Plantation is a historic plantation house located in Faunsdale, Alabama. It was built in 1850 by Andrew Pickens Calhoun as an overseer's house for this, his second plantation. He added about 420 acres to Cuba Plantation, purchased from William Henry Tayloe, son of John Tayloe III of The Octagon House-called Adventure. His primary plantation was the nearby Tulip Hill. Andrew Calhoun was the son of John C. Calhoun, seventh Vice President of the United States, who frequented the Octagon House while in Washington, D.C. as Secretary of War and later an independent outlier of the anti-Jacksonian Whig Party, later realigning himself with the Democrats' policies. It was sold in 1863 to Tristram Benjamin Bethea, who resided in Montgomery County, Alabama. Originally a one-story structure, the house was later enlarged on the ground floor and a second story added by the Bethea family. The house was added to the National Register of Historic Places on July 13, 1993, as a part of the Plantation Houses of the Alabama Canebrake and Their Associated Outbuildings Multiple Property Submission.
Document 4: Martin Van Buren: Martin Van Buren (Dutch: "Maarten van Buren" ; December 5, 1782 – July 24, 1862) was the eighth President of the United States (1837–41). A founder of the Democratic Party, he served in a number of senior roles, including eighth Vice President (1833–37) and tenth Secretary of State (1829–31), both under Andrew Jackson. Van Buren won the presidency by promising to continue Jackson's policies. Shortly after taking office, the Panic of 1837 struck the nation, and his inability to deal effectively with the economic crisis, combined with the growing political strength of the opposition Whig Party, led to his defeat. During his half-century of public service, he built, perfected, and defended a new system of political parties at first the state and then the federal level.
Document 5: Lansing, Michigan: Lansing is the capital of the US state of Michigan. It is mostly in Ingham County, although portions of the city extend west into Eaton County and north into Clinton County. The 2010 Census placed the city's population at 114,297, making it the fifth largest city in Michigan. The population of its Metropolitan Statistical Area (MSA) was 464,036, while the even larger Combined Statistical Area (CSA) population, which includes Shiawassee County, was 534,684. It was named the new state capital of Michigan in 1847, ten years after Michigan became a state.
Document 6: Saginaw County, Michigan: Saginaw County, officially the County of Saginaw, is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 200,169. The county seat is Saginaw. The county was created by September 10, 1822, and was fully organized on February 9, 1835. The etymology of the county's name is uncertain. It may be derived from "Sace-nong" or "Sak-e-nong" (English: Sauk land ), as the Sauk (French: "Sac" ) tribe once lived there. Another possibility is that it comes from Ojibwe words meaning "place of the outlet" –"sag" (English: an opening ) and "ong" (English: place of ). "See" List of Michigan county name etymologies.
Document 7: First inauguration of Andrew Jackson: The first inauguration of Andrew Jackson as the seventh President of the United States was held on Wednesday, March 4, 1829 at the United States Capitol in Washington, D.C.. The inauguration marked the commencement of the first four-year term of Andrew Jackson as President and the second term of John C. Calhoun as Vice President. Chief Justice John Marshall administered the presidential oath of office. Calhoun resigned into this term, and the office remained vacant for the balance of it. (Prior to ratification of the Twenty-fifth Amendment in 1967, no constitutional provision existed for filling an intra-term vacancy in the vice presidency.)
Document 8: Ulysses S. Grant: Ulysses S. Grant, born Hiram Ulysses Grant , (April 27, 1822 – July 23, 1885) was the Commanding General of the United States Army at the end of the American Civil War and later the 18th President of the United States from 1869 to 1877. As Commanding General, Grant worked closely with President Abraham Lincoln to lead the Union Army to victory over the Confederacy in the Civil War. Supported by Congress, Grant implemented Reconstruction, often at odds with President Andrew Johnson. Twice elected president, Grant led the Republicans in their effort to remove the vestiges of Confederate nationalism and slavery, protect African-American citizenship, and support economic prosperity. Although his presidency has often been criticized for multiple administration scandals and for his failure to alleviate the economic depression following the Panic of 1873, he is regarded as a President who performed relatively well in the context of his time and pursued justice for all.
Document 9: John Andrew Jackson: John Andrew Jackson was born on a Country plantation in Sumter County, South Carolina. His grandfather was born in Africa. John Andrew's mother was named Betty and his father was known as Dr. Clavern, because of his ability to cure snake bites. John Andrew had five brothers and five sisters. Before he left the plantation, two brothers and two sisters were dead.
Document 10: Mason, Michigan: Mason is a city in the U.S. state of Michigan. It is named after the state's first governor, Stevens T. Mason. As of the 2010 census, the city population was 8,252. It is the county seat of Ingham County. Mason is the only city in the U.S. that serves as a county seat ahead of a state capital, with the capital of Lansing also in Ingham County. Despite Mason being the county seat, many county offices and courtrooms are located in Lansing.
Document 11: Wayne County, Michigan: Wayne County is the most populous county in the U.S. state of Michigan. As of the 2016 census, its population was 1,749,366 making it the 19th-most populous county in the United States. The 2014 Census update listed the county's population at 2,264,804. The county seat is Detroit, the most populous city in Michigan and 18th-most populous city in the United States. The county was founded in 1796 and organized in 1815.
Document 12: John Quincy Adams: John Quincy Adams ( ; July 11, 1767 – February 23, 1848) was an American statesman who served as a diplomat, United States Senator, member of the House of Representatives, and the sixth President of the United States from 1825 to 1829. He was a member of the Federalist, Democratic-Republican, National Republican, and later the Anti-Masonic and Whig parties. He was the son of President John Adams and Abigail Adams and thus contributed to the formation of the Adams political family.
Document 13: James K. Polk: James Knox Polk (November 2, 1795 – June 15, 1849) was the 11th President of the United States (1845–49). He previously served as the 13th Speaker of the House of Representatives and as Governor of Tennessee. A protege of Andrew Jackson, Polk was a member of the Democratic Party and an adherent of Jacksonian democracy and Manifest Destiny. During his presidency, the United States expanded significantly with the annexation of Republic of Texas, the Oregon Treaty, and the conclusion of the Mexican-American War.
Document 14: Jefferson Davis: Jefferson Davis (born Jefferson Finis Davis; June 3, 1808 – December 6, 1889) was an American politician who served as the President of the Confederate States from 1861 to 1865. He was a member of the Democratic Party who represented Mississippi in the United States Senate and the House of Representatives prior to becoming president of the Confederacy. He was the 23rd United States Secretary of War, serving under U.S. President Franklin Pierce from 1853 to 1857.
Document 15: Calhoun County, Michigan: Calhoun County is a county in the U.S. state of Michigan. As of the 2010 census, the population was 136,146. The county seat is Marshall. The county was established on October 19, 1829 and named after John C. Calhoun, who was at the time Vice President under Andrew Jackson, making it one of Michigan's Cabinet counties. County government was first organized March 6, 1833.
ground_truth: Calhoun County