Question: When did the state where Elven C. Smith built his house get into the Union?

full_context: Document 1: William G. and Anne Williams House: The Williams house is a Queen Anne style Victorian home that has been on the Wisconsin State and National Register of Historic Places since 2005. The home is known officially on the historical register as the Williams, William G. and Anne, House. The home was built by, W. G. Williams, a banker in the small town.
Document 2: American Civil War: The American Civil War (commonly known as the Civil War in the United States) was fought in the United States from 1861 to 1865. The result of a long - standing controversy over slavery, war broke out in April 1861, when Confederates attacked Fort Sumter in South Carolina, shortly after President Abraham Lincoln was inaugurated. The nationalists of the Union proclaimed loyalty to the U.S. Constitution. They faced secessionists of the Confederate States of America, who advocated for states' rights to travel with slave attendants in the Americas or abolished tariffs on cotton and imports.
Document 3: Virginia in the American Civil War: The Commonwealth of Virginia was a prominent part of the Confederate States during the American Civil War. As a slave - holding state, it held a state convention to deal with the secession crisis, and voted against secession on 4 April 1861. Opinion shifted after 15 April, when U.S. President Abraham Lincoln called for troops from all states still in the Union to put down the rebellion, following the capture of Fort Sumter, and the Virginia convention voted to declare secession from the Union. (In the Western counties, where there was little slavery, pro-Union sentiment remained strong, and they presently seceded from Virginia as a separate Union state, West Virginia.)
Document 4: West Virginia: West Virginia became a state following the Wheeling Conventions of 1861, after the American Civil War had begun. Delegates from some Unionist counties of northwestern Virginia decided to break away from Virginia, although they included many secessionist counties in the new state. West Virginia was admitted to the Union on June 20, 1863, and was a key border state during the war. West Virginia was the only state to form by separating from a Confederate state, the first to separate from any state since Maine separated from Massachusetts, and was one of two states admitted to the Union during the American Civil War (the other being Nevada). While a portion of its residents held slaves, most of the residents were yeomen farmers, and the delegates provided for gradual abolition of slavery in the new state constitution.
Document 5: Slave states and free states: West Virginia became the 35th state on June 20, 1863, and the last slave state admitted to the Union. Eighteen months later, the West Virginia legislature completely abolished slavery, and also ratified the 13th Amendment on February 3, 1865.
Document 6: If the South Had Won the Civil War: The Confederacy was also faced with the issue of slavery, very much contested despite its victory in what came to be known as ``The War of the Southern Revolution. ''With the rest of the world abolishing slavery, Confederates started feeling that they were out of step. Virginia abolished slavery in its territory, followed by Kentucky and North Carolina, and later Maryland and Tennessee. A new political force named the Jeffersonian Party called for abolition of slavery and gained the support of such prominent persons as Stephen Dodson Ramseur, Robert E. Rodes, John Pegram and, later, Leonidas Polk. Finally, Confederate slavery was fully abolished in 1885, the Liberation Bill being adopted with little opposition under the presidency of James Longstreet. Southerners having resolved this by themselves, rather than having the decision forced upon them by a victorious hostile army, helped avoid any lingering bitterness, and no organization resembling the Ku Klux Klan arose.
Document 7: History of West Virginia: West Virginia is one of two American states formed during the American Civil War (1861 -- 1865), along with Nevada, and is the only state to form by seceding from a Confederate state. It was originally part of the British Virginia Colony (1607 -- 1776) and the western part of the state of Virginia (1776 -- 1863), whose population became sharply divided over the issue of secession from the Union and in the separation from Virginia, formalized by admittance to the Union as a new state in 1863. West Virginia was one of the Civil War Border states.
Document 8: Elven C. Smith House: Elven C. Smith House is a historic home located at Williamson, Mingo County, West Virginia. It was built in 1938, in a Neo-Classical Revival / Georgian Revival style. It is a red brick building with a hipped roof and features a two-story, flat roofed portico supported by fluted columns. Also on the property is a stone retaining wall and monumental stairway in the landscaped gardens.
Document 9: West Virginia Colored Children's Home: West Virginia Colored Children's Home, also known as the West Virginia Home for Aged and Infirm Colored Men and Women and University Heights Apartments, was a historic school, orphanage, and sanatorium building located near Huntington, Cabell County, West Virginia. It was built in 1922-1923, and was a three-story red brick building in the Classical Revival style. It was founded as the West Virginia Normal and Industrial School for Colored Children in Bluefield, West Virginia. This facility was the last of a series of buildings that were constructed to hold the state's first social institution exclusively serving the needs of African American residents. The West Virginia Colored Children's Home was closed in 1956 and the building was used as a rest home. The property transferred to Marshall University in 1961 and later it was converted to apartments. The building was demolished on May 5, 2011. The location is now the home of Huntington East Middle School.
Document 10: Louis and Ellen Olson House: The Louis and Ellen Olson House, a Craftsman style mansion built in 1903, is located near downtown Enumclaw, Washington, United States. It has been listed on the National Register of Historic Places since 1984. The mansion is currently a private residence.
Document 11: John A. Snively: During the 1940s, Snively built Magnolia Mansion, a stately New Orleans style home on the shores of Lake Eloise, on Winter Haven's famous Chain of Lakes. Magnolia Mansion was purchased by Cypress Gardens theme park in the 1970s.
Document 12: J. Warren Smith House: The J. Warren Smith House is a house at 21 North Palmetto Street at the corner of North Palmetto and Edgemont Streets in Liberty, South Carolina in Pickens County. It has also been called "Maggie Manor" and the Myrtle Inn, which were names during its use as a boarding house. It was named to the National Register of Historic Places on January 26, 2005. It is considered an excellent example of a Colonial Revival house and for its connection with J. Warren Smith, who was a local business executive.
Document 13: Confederate States of America: Missouri and Kentucky were represented by partisan factions adopting the forms of state governments without control of substantial territory or population in either case. The antebellum state governments in both maintained their representation in the Union. Also fighting for the Confederacy were two of the ``Five Civilized Tribes ''-- the Choctaw and the Chickasaw -- in Indian Territory and a new, but uncontrolled, Confederate Territory of Arizona. Efforts by certain factions in Maryland to secede were halted by federal imposition of martial law; Delaware, though of divided loyalty, did not attempt it. A Unionist government was formed in opposition to the secessionist state government in Richmond and administered the western parts of Virginia that had been occupied by Federal troops. The Restored Government later recognized the new state of West Virginia, which was admitted to the Union during the war on June 20, 1863, and re-located to Alexandria for the rest of the war.
Document 14: North Carolina: In 1860, North Carolina was a slave state, in which one-third of the population was enslaved. This was a smaller proportion than in many Southern states. The state did not vote to join the Confederacy until President Abraham Lincoln called on it to invade its sister state, South Carolina, becoming the last or second-to-last state to officially join the Confederacy. The title of "last to join the Confederacy" has been disputed; although Tennessee's informal secession on May 7, 1861, preceded North Carolina's official secession on May 20, the Tennessee legislature did not formally vote to secede until June 8, 1861.
Document 15: Wooldridge-Rose House: The Wooldridge-Rose House, located in Pewee Valley, Kentucky, was placed on the National Register of Historic Places in 2007. It is a c.1905 Colonial Revival-style house, two stories high of considerable size. Its foundation is limestone block foundation with a roof of tin and shingles, and weatherboard siding.
ground_truth: June 20, 1863
sub_queries: Which state is Elven C. Smith House located? Answer: West Virginia
when was West Virginia admitted to the union Answer: June 20, 1863