Question: Who is the spouse of the individual who appeared on the $20 bill in 1875?

full_context: Document 1: United States twenty-dollar bill: 1861: A demand note with Lady Liberty holding a sword and shield on the front, and an abstract design on the back. The back is printed green.
Document 2: United States twenty-dollar bill: 1861: A demand note with Lady Liberty holding a sword and shield on the front, and an abstract design on the back. The back is printed green. 1862: A note that is very similar, the first $20 United States note. The back is different, with several small variations extant. 1863: A gold certificate $20 note with an Eagle vignette on the face. The reverse has a $20 gold coin and various abstract elements. The back is orange. 1865: A national bank note with ``The Battle of Lexington ''and Pocahontas's marriage to John Rolfe in black, and a green border. 1869: A new United States note design, with Alexander Hamilton on the left side of the front and Victory holding a shield and sword. The back design is green. 1875: As above, except with a different reverse. 1878: A silver certificate $20 note with a portrait of Stephen Decatur on the right side of the face. The back design is black. 1882: A new gold certificate, with a portrait of James Garfield on the right of the face. The back is orange and features an eagle. 1882: A new national bank note. The front is similar, but the back is different and printed in brown. 1886: A new silver certificate $20 note, with Daniel Manning on the center of the face. 1890: A treasury (coin) note with John Marshall on the left of the face. Two different backs exist both with abstract designs. 1902: A new national bank note. The front features Hugh McCulloch, and the back has a vignette of an allegorical America. 1905: A new gold certificate $20 note, with George Washington on the center of the face. The back design is orange.
Document 3: United States twenty-dollar bill: October 9, 2003: The current series of 20 dollar bills is released with light background shading in green and yellow, and no oval around Andrew Jackson's portrait (background images of eagles, etc. were also added to the front); the back is the same view of the White House, but without the oval around it. Ninety faint ``20 ''s are scattered on the back in yellow as a`` EURion constellation'' to prevent photocopying. The first issue's series date is 2004 with Marin - Snow signatures. The bills were first printed in April 2003.
Document 4: United States twenty-dollar bill: 1869: A new United States note design, with Alexander Hamilton on the left side of the front and Victory holding a shield and sword. The back design is green.
Document 5: History of the United States dollar: The federal government began issuing currency like the Spanish dollars during the American Civil War. As photographic technology of the day could not reproduce color, it was decided the back of the bills would be printed in a color other than black. Because the color green was seen as a symbol of stability, it was selected. These were known as ``greenbacks ''for their color and started a tradition of the United States' printing the back of its money in green. The author of that invention was chemist Christopher Der - Seropian. In contrast to the currency notes of many other countries, Federal Reserve notes of varying denominations are the same colors: predominantly black ink with green highlights on the front, and predominantly green ink on the back. Federal Reserve notes were printed in the same colors for most of the 20th century, although older bills called`` silver certificates'' had blue highlights on the front, and ``United States notes ''had red highlights on the front.
Document 6: William Thomas Hamilton: William Thomas Hamilton (September 8, 1820October 26, 1888), a member of the United States Democratic Party, was the 38th Governor of Maryland in the United States from 1880 to 1884. He also served in the United States Senate, representing the State of Maryland, from 1868–1874, and in the House of Representatives, representing the second district (1849–1853) and fourth district (1853–1855) of Maryland.
Document 7: United States two-dollar bill: In March 1862, the first $2 bill was issued as a Legal Tender Note (United States Note) with a portrait of Alexander Hamilton; the portrait of Hamilton used was a profile view and is not the same portrait used currently for the $10 bill. The continental congress based on defending the United States, released on June 25, 1776, began to authorize $2 credit, the circulation of 49,000 copies. Pass two - dollar bill was first used in March 1862. Between 1966 and 1976, two - dollar notes were not printed.
Document 8: William Thompson (Upper Canada): He was born in New Brunswick in 1786, the son of a United Empire Loyalist, and came to Grantham Township with his family in 1809. He served as captain in the local militia during the War of 1812 and fought at the Battle of Queenston Heights. He was taking prisoner by the Americans while on a scouting expedition. When he returned, his father had died and their property damaged; he settled in Toronto Township. He built a sawmill with his brother in 1817. During the Upper Canada Rebellion, he served as colonel in the York militia and became lieutenant colonel in 1846. In 1824, he was elected to the 9th Parliament of Upper Canada for York and Simcoe. He was a conservative member, with close ties to members of the so-called "Family Compact". After several attempts at reelection, he retired to local politics. In 1844, he became a member of the township council and was reeve in 1851.
Document 9: United States one-dollar bill: The United States one - dollar bill ($1) is a denomination of United States currency. An image of the first U.S. President (1789 -- 97), George Washington, based on a painting by Gilbert Stuart, is currently featured on the obverse (front), and the Great Seal of the United States is featured on the reverse (back). The one - dollar bill has the oldest overall design of all U.S. currency currently being produced (The current two - dollar bill obverse design dates from 1928, while the reverse appeared in 1976). The obverse design of the dollar bill seen today debuted in 1963 (the reverse in 1935) when it was first issued as a Federal Reserve Note (previously, one dollar bills were Silver Certificates).
Document 10: United States dollar: Denomination Front Reverse Portrait Reverse motif First series Latest series Circulation One Dollar George Washington Great Seal of the United States Series 1935 Series 2017 Wide Two Dollars Thomas Jefferson Trumbull's Declaration of Independence Series 1976 Series 2013 Limited Five Dollars Abraham Lincoln Lincoln Memorial Series 2006 Series 2013 Wide Ten Dollars Alexander Hamilton U.S. Treasury Series 2004A Series 2013 Wide Twenty Dollars Andrew Jackson White House Series 2004 Series 2013 Wide Fifty Dollars Ulysses S. Grant United States Capitol Series 2004 Series 2013 Wide One Hundred Dollars Benjamin Franklin Independence Hall Series 2009 Series 2013 Wide
Document 11: William S. Hamilton: William Stephen Hamilton (August 4, 1797 – October 9, 1850), a son of Alexander Hamilton and Elizabeth Schuyler Hamilton, was an American politician and miner who lived much of his life in the U.S. state of Illinois and territorial Wisconsin. Hamilton was born in New York, where he attended the United States Military Academy before he resigned and moved to Illinois in 1817. In Illinois he lived in Springfield and Peoria and eventually migrated to the lead-mining region of southern Wisconsin and established Hamilton's Diggings at present-day Wiota. Hamilton served in various political offices and as a commander in two Midwest Indian Wars. In 1849 he moved to California on the heels of the California Gold Rush. He died in Sacramento, most likely of cholera, in October 1850.
Document 12: William H. Stevenson: William Stevenson was born in Kenosha, Wisconsin and his family moved to La Crosse, Wisconsin when he was young. Stevenson graduated from the La Crosse Normal School (now the University of Wisconsin–La Crosse) and taught in area high schools. He went to law school in Madison and was admitted to the bar. Stevenson was District Attorney for Richland County, Wisconsin from 1924 to 1926. He moved to La Crosse and was District Attorney for La Crosse County from 1935 until 1941. In 1940 he was elected to the 77th United States Congress representing Wisconsin's 3rd congressional district. He was reelected to the following three congresses as well serving from January 3, 1941 till January 3, 1949. Stevenson died in La Crosse and was buried in Onalaska, Wisconsin.
Document 13: William Henry Harrison Tomb State Memorial: The William Henry Harrison Tomb State Memorial is the final resting place of William Henry Harrison, ninth President of the United States; his wife Anna Harrison; and his son John Scott Harrison, Representative and father of the twenty-third President, Benjamin Harrison. It is located on Brower Road approximately one-half mile west of U.S. Route 50 in North Bend, Ohio.
Document 14: William Henry Harrison: William Henry Harrison Sr. (February 9, 1773 -- April 4, 1841) was an American military officer, a principal contributor in the War of 1812, and the ninth president of the United States (1841). He was the last president born before the American Revolution, and died of pneumonia just 31 days into his term, thereby serving the shortest tenure in United States presidential history. He was the first president to die in office, and his death sparked a brief constitutional crisis. Its resolution left unsettled Constitutional questions as to the presidential line of succession until the passage of the Twenty - fifth Amendment to the United States Constitution in 1967. Harrison was a son of Founding Father Benjamin Harrison V and the paternal grandfather of Benjamin Harrison, the 23rd United States President (1889 -- 1893).
Document 15: Henry Gratiot: The second eldest son of Illinois pioneer Charles Gratiot, Sr. and Victoire Chouteau, Henry Gratiot was born in St. Louis, Spanish Upper Louisiana Territory, in the present-day State of Missouri. He became engaged to Susan Hempstead, only two years after her family arrived from Connecticut, and the two eventually married on June 21, 1813. The youngest daughter of Revolutionary War soldier Stephen Hempstead, her brothers included Edward Hempstead, the first congressional delegate for the Missouri Territory, as well as prominent lawyer Charles S. Hempstead and businessman William Hempstead. He and his wife would live at a small farm and mill, west of St. Louis, for the next several years.
ground_truth: Elizabeth Schuyler Hamilton
sub_queries: who appeared on the $20 bill in 1875 Answer: Alexander Hamilton
Alexander Hamilton >> spouse Answer: Elizabeth Schuyler Hamilton