Question: When did the first Walmart open in the state where the Hollins-Roundhouse Historic District is located?

full_context: Document 1: New York City: Throughout its history, the city has been a major port of entry for immigrants into the United States; more than 12 million European immigrants were received at Ellis Island between 1892 and 1924. The term "melting pot" was first coined to describe densely populated immigrant neighborhoods on the Lower East Side. By 1900, Germans constituted the largest immigrant group, followed by the Irish, Jews, and Italians. In 1940, whites represented 92% of the city's population.
Document 2: Leadenhall Street Baptist Church: Leadenhall Street Baptist Church is a historic located at Baltimore, Maryland, United States. It is a gable-front rectangular brick temple with simple Renaissance Revival detail. The original exterior wall surfaces have been covered with formstone on the main façade and stucco elsewhere. It features round-arched stained glass windows on each side bay. It was built in 1873, by Joseph Thomas & Son for the city's African American Baptists who were then centered in the old southwest area from the downtown business district of Baltimore in the "Sharp-Leadenhall" (named for the intersecting nearby streets) community in the old "South Baltimore" area. Nearby is its now famed revitalized "Inner Harbor" area of the old "Basin" for the harbor port.
Document 3: History of Walmart: In 1981, Wal - Mart expanded into the southeastern US market, opening stores in Georgia and South Carolina, and acquiring 92 Kuhn's Big K stores. They expanded into Florida and Nebraska in 1982.
Document 4: Hinton Historic District: The Hinton Historic District is a national historic district located at Hinton, Summers County, West Virginia. The original Hinton Historic District is bordered roughly by the Chesapeake and Ohio Railroad line, James Street, 5th Avenue, and Roundhouse. The boundary increase extended the district to include Mill Street. It encompasses 212 contributing buildings, one contributing structure (a railroad water tank), and two contributing objects (veterans' memorials). They include the business and commercial core of Hinton and surrounding residential areas. The buildings are largely two and three story with first floor commercial activities with offices and apartments above. Many of the buildings feature stone trim and some have cast iron store fronts. Residential buildings are representative of popular late 19th- and early 20th-century architectural styles. Notable buildings include the Wagon Wheel Restaurant (1876), Summers County Library, R.R. Flanagan Building (c. 1906), Lowe Furniture Company Building (c. 1905), former National Bank of Summers building, O. Ike Keaton residence (c. 1905), Bluestone Tire Company building (C. 1919), C&O Railway Passenger Station, Y.M.C.A. (c. 1911), First Baptist Church (1913), Hotel McCreery (c. 1907), Ewart-Miller Building (c. 1905), McCreery / Palmer residence, Carnegie Library, Summers County Jail (1870s), and U.S. Post Office (1926, expanded 1960s). Located in the district is the separately listed Summers County Courthouse.
Document 5: 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 6: Philadelphia: For much of Philadelphia's history, the typical home has been the row house. The row house was introduced to the United States via Philadelphia in the early 19th century and, for a time, row houses built elsewhere in the United States were known as "Philadelphia rows". A variety of row houses are found throughout the city, from Victorian-style homes in North Philadelphia to twin row houses in West Philadelphia. While newer homes are scattered throughout the city, much of the housing is from the early 20th century or older. The great age of the homes has created numerous problems, including blight and vacant lots in many parts of the city, while other neighborhoods such as Society Hill, which has the largest concentration of 18th-century architecture in the United States, have been rehabilitated and gentrified.
Document 7: Otterbein, Baltimore: Otterbein is a small neighborhood of historic rowhouses in Baltimore, Maryland, United States. Otterbein is immediately southwest of, and in close walking distance to, the Inner Harbor. The neighborhood is very compact, entirely located between Hanover Street and Sharp Street, and between Barre Street and Henrietta Street. It is in small parts of zip codes 21201 and 21230. It is named for Old Otterbein Church (Baltimore, Maryland), located immediately north of the neighborhood.
Document 8: History of Walmart: By 1977, Wal - Mart expanded into Illinois and made its first corporate acquisition, assuming ownership and operation of the Mohr - Value stores, which operated in Missouri and Illinois. This was followed by the acquisition of the Hutcheson Shoe Company in 1978. In the same year Walmart also branched out into several new markets, launching its pharmacy, auto service center, and jewelry divisions.
Document 9: 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 10: Old Catonsville Historic District: Old Catonsville Historic District is a national historic district in Catonsville, Baltimore County, Maryland, United States. It was laid out with the construction of the electric railway and is overwhelmingly residential, with three churches (one with a school), a modern public library, and an Art Deco water tower. Architectural styles in the district range from mid- to late-19th century vernacular "I-houses" to late-19th and early-20th century styles such as Queen Anne, Bungalow, Colonial Revival, Dutch Colonial, Tudor Revival, and Craftsman. A large number of these dwellings have freestanding garages, typically finished in a like manner to their houses.
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: 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 13: Walmart: Walmart Inc. Walmart's current logo since 2008 Walmart's official headquarters in Bentonville, Arkansas Formerly called Wal - Mart, Inc. (1969 -- 70) Wal - Mart Stores, Inc. (1970 -- 2018) Type Public Traded as NYSE: WMT DJIA component S&P 100 component S&P 500 component ISIN US9311421039 Industry Retail Founded July 2, 1962; 55 years ago (1962 - 07 - 02) Rogers, Arkansas, U.S. Founder Sam Walton Headquarters Bentonville, Arkansas, United States Number of locations 11,718 stores worldwide (January 31, 2018) Area served Worldwide Key people Greg Penner (Chairman) Doug McMillon (President & CEO) Products Electronics Movies and music Home and furniture Home improvement Clothing Footwear Jewelry Toys Health and beauty Pet supplies Sporting goods and fitness Auto Photo finishing Craft supplies Party supplies Grocery Services Walmart - 2 - Walmart Walmart MoneyCard Pickup Today Walmart.com Walmart Pay Revenue US $500.34 billion (2018) Operating income US $20.437 billion (2018) Net income US $9.862 billion (2018) Total assets US $204.52 billion (2018) Total equity US $77.869 billion (2018) Owner Walton family (51%) Number of employees 2.3 million, Worldwide (2017) 1.4 million, U.S. (2017) Divisions Walmart U.S. Walmart International Sam's Club Global eCommerce Subsidiaries Walmart Canada Walmart Mexico Walmart Chile Walmart de México y Centroamérica @ WalmartLabs Walmart Neighborhood Market Asda Amigo Supermarkets Vudu Massmart Seiyu Group Bompreço Líder Jet.com Hayneedle Moosejaw ModCloth Flipkart Website Corporate website Commercial website Footnotes / references
Document 14: Hollins–Roundhouse Historic District: Hollins–Roundhouse Historic District (also known as B-5144) is a national historic district in Baltimore, Maryland, United States. It is a primarily residential area characterized by 19th century rowhouses. The neighborhood is historically significant due to its association with the development of rail transportation in Maryland. Additional historical significance comes from the neighborhood's association with ethnic immigration to Baltimore. During the 1840s and 1850s the area was a center of settlement for Baltimore's German and Irish communities, many of whom immigrated to the United States to work in the rail industry. Later, from the 1880s to the 1920s, the neighborhood became established as the center of Baltimore's Lithuanian immigrant community. Because of the large Lithuanian population in the area north of Hollins Street, the area became known as Little Lithuania. A few remnants of the neighborhood's Lithuanian heritage still remain, such as Lithuanian Hall located on Hollins Street.
Document 15: Philadelphia: Irish, Italians, Polish, Germans, English, and Greeks are the largest ethnic European groups in the city. Philadelphia has the second-largest Irish and Italian populations in the United States, after New York City. South Philadelphia remains one of the largest Italian neighborhoods in the country and is home to the Italian Market. The Pennsport neighborhood and Gray's Ferry section of South Philadelphia, home to many Mummer clubs, are well known as Irish neighborhoods. The Kensington section, Port Richmond, and Fishtown have historically been heavily Irish and Polish. Port Richmond is well known in particular as the center of the Polish immigrant and Polish-American community in Philadelphia, and it remains a common destination for Polish immigrants. Northeast Philadelphia, although known for its Irish and Irish-American population, is also home to a large Jewish and Russian population. Mount Airy in Northwest Philadelphia also contains a large Jewish community, while nearby Chestnut Hill is historically known as an Anglo-Saxon Protestant stronghold.
ground_truth: 1991
sub_queries: In which state is Hollins-Roundhouse Historic District located? Answer: Maryland
when did the first walmart open in Maryland Answer: 1991