Question: When did the first Walmart open in the state where Knox Township is located?

full_context: Document 1: Knox Township, Knox County, Illinois: Knox Township is one of twenty-one townships in Knox County, Illinois, USA. As of the 2010 census, its population was 5,027 and it contained 2,147 housing units.
Document 2: History of Walmart: In 1991, the company expanded into Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, and New York. Walmart expanded worldwide this year, with the opening of their first store outside the United States in Mexico City. They also acquired Western Merchandisers, Inc. of Amarillo, Texas. 1991 also saw the launch of the Sam's American Choice brand of products.
Document 3: Sam's Club: Sam's West, Inc. (doing business as Sam's Club) is an American chain of membership-only retail warehouse clubs owned and operated by Walmart Inc., founded in 1983 and named after Walmart founder Sam Walton. , Sam's Club ranks second in sales volume among warehouse clubs with $57.839 billion in sales (in fiscal year 2019) behind rival Costco Wholesale.
Document 4: Madison, Indiana: Madison is a city in and the county seat of Jefferson County, Indiana, United States, along the Ohio River. As of the 2017 United States Census estimate its population was 11,777. Over 55,000 people live within of downtown Madison. Madison is the largest city along the Ohio River between Louisville and Cincinnati. Madison is one of the core cities of the Louisville-Elizabethtown-Madison metroplex, an area with a population of approximately 1.5 million. In 2006, the majority of Madison's downtown area was designated the largest contiguous National Historic Landmark in the United States—133 blocks of the downtown area is known as the Madison Historic Landmark District.
Document 5: Ohio County, Indiana: Ohio County is a county located in southeastern Indiana. With a 2010 population of 6,128, and an area of just 87 square miles, Ohio County is the smallest county in Indiana in both area and population. The county seat and only incorporated municipality is Rising Sun. The county was officially established in 1844 and was one of the last Indiana counties to be created.
Document 6: Indiana: In order to decrease the threat of Indian raids following the Battle of Tippecanoe, Corydon, a town in the far southern part of Indiana, was named the second capital of the Indiana Territory in May 1813. Two years later, a petition for statehood was approved by the territorial general assembly and sent to Congress. An Enabling Act was passed to provide an election of delegates to write a constitution for Indiana. On June 10, 1816, delegates assembled at Corydon to write the constitution, which was completed in 19 days. President James Madison approved Indiana's admission into the union as the nineteenth state on December 11, 1816. In 1825, the state capital was moved from Corydon to Indianapolis.
Document 7: College Township, Knox County, Ohio: College Township is one of the twenty-two townships of Knox County, Ohio, United States. The 2010 census found 2,731 people in the township, 340 of whom lived in the unincorporated portions of the township.
Document 8: History of Walmart: By 1988, Walmart was operating in 27 states, having expanded into Arizona, Michigan, Ohio, West Virginia, New Jersey, and Wyoming. By 1990, they expanded into California (which marked Walmart officially becoming a fully nationwide retailer), Nevada, North Dakota, Pennsylvania, South Dakota, and Utah. The Walmart Visitor's Center also opened this year on the site of Sam Walton's original store.
Document 9: Sam's Club: As of January 31, 2018, Sam's Club operates 597 membership warehouse clubs in 44 U.S. states. Alaska, Massachusetts, Oregon, Rhode Island, Vermont, and Washington are the only states where Sam's Club does not operate, as is the case for the District of Columbia. Walmart International also operates Sam's Clubs in Mexico, Brazil, and China. It has 162 locations in Mexico, 27 locations in Brazil, and 19 in China. Locations generally range in size from 94,000 -- 161,000 sq ft (8,700 -- 15,000 m), with an average club size of approximately 134,000 sq ft (12,400 m).
Document 10: Miller Township, Knox County, Ohio: Miller Township is one of the twenty-two townships of Knox County, Ohio, United States. The 2010 census found 1,006 people in the township.
Document 11: History of Walmart: In April 1983, the company opened its first Sam's Club store, a membership - based discount warehouse club, in Midwest City, Oklahoma. They also expanded into Indiana, Iowa, New Mexico, and North Carolina and implemented ``people greeters ''in all of their stores. The first stores opened in Virginia in 1984.
Document 12: Boone Township, Boone County, Illinois: Boone Township is one of nine townships in Boone County, Illinois, USA. As of the 2010 census, its population was 1,968 and it contained 721 housing units.
Document 13: Indiana: Indiana  (listen) is a U.S. state in the Midwestern and Great Lakes regions of North America. Indiana is the 38th-largest by area and the 17th-most populous of the 50 United States. Its capital and largest city is Indianapolis. Indiana was admitted to the United States as the 19th U.S. state on December 11, 1816. Indiana borders Lake Michigan to the northwest, Michigan to the north, Ohio to the east, Kentucky to the south and southeast, and Illinois to the west.
Document 14: Knox County, Indiana: Knox County is a county located in Indiana in the United States. It was one of two original counties created in the old Northwest Territory in 1790 and was reduced to its present size in 1817. , the population was 38,440. The county seat is Vincennes.
Document 15: Eastern Township, Knox County, Nebraska: Eastern Township is one of thirty townships in Knox County, Nebraska, United States. The population was 303 at the 2000 census. A 2006 estimate placed the township's population at 288.
ground_truth: 1983
sub_queries: Knox Township >> located in the administrative territorial entity Answer: Knox County
Knox County >> located in the administrative territorial entity Answer: Indiana
when did the first walmart open in Indiana Answer: 1983