Question: when did the first walmart open in the state where Jacob Highbarger House was located?

full_context: Document 1: Jackson Homestead: The Jackson Homestead, located at 527 Washington Street, in the village of Newton Corner, in Newton, Massachusetts, is an historic house that served as a station on the Underground Railroad before the Civil War.
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: Homestead Grays Bridge: The Homestead Grays Bridge, also known as the (Homestead) High Level Bridge, was built in 1936 and spans the Monongahela River between Homestead Borough and the southernmost tip of Pittsburgh's Squirrel Hill neighborhood. It is notable as the first bridge to incorporate the Wichert Truss, which uses a quadrilateral shape over each support, into its design. This made the truss statically determinate, so that forces in the structural members could be calculated.
Document 4: 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 5: 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 6: Commodore Joshua Barney House: The Commodore Joshua Barney House is a historic home located at Savage, Howard County, Maryland, United States. It was originally situated on a 700-acre tract in modern Savage Maryland named Harry's Lot, at a time when the closest town was Elk Ridge. In 1809, Nathaniel F. Williams (1782-1864) married Caroline Barney, daughter of Joshua Barney, who in turn expanded an existing mill site on the property to create the Savage Mill.
Document 7: Joseph C. Hays House: The Joseph C. Hays House at 103-105 West Main Street in Sharpsburg, Maryland, United States was originally built in 1823 as a three-bay side hall double-parlor house in the Federal style. It was soon expanded to the east with a two-bay parlor and one commercial bay. The east parlor entered commercial use during the mid-19th century as a dry goods store operated by Benjamin F. Cronise. "Circa" 1920 a storefront was added and a copper front was applied with BANK lettered under a central pediment, behind a marquee.
Document 8: Jacob Highbarger House: The Jacob Highbarger House was built "circa" 1832 in Sharpsburg, Maryland, United States. The Greek Revival-influenced house is a late example of limestone construction in the Cumberland Valley of Maryland, with an attached log workshop. The log structure is an unusual example of corner-post log construction with diagonal bracing.
Document 9: 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 10: Madison Historic District (Madison, Indiana): Many of the prominent buildings in the district were built by Madison-native-architect Francis Costigan, who favored the Greek Revival style. Two of these are National Historic Landmarks: the Lanier Mansion, and the Charles L. Shrewsbury House. The Lanier Mansion was the former home of James Lanier, who lent money to governor Oliver P. Morton to run the Indiana state government to circumvent the legislative process between 1862-1865. The Shrewsbury-Windle House was built for steamboat captain Charles Shrewsbury, who would later become a mayor of Madison. Costigan, himself, built his home in the district, and it is considered one of the best uses of a narrow lot by modern architects. A thirty-foot parlor is considered the highlight of the House.
Document 11: 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 12: 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 13: Jeptha Hayman House: The Jeptha Hayman House, also known as Hayman Farm, is a historic home located at Kingston, Somerset County, Maryland, United States. It is a two-story, five-bay weatherboard frame dwelling in the Greek Revival-style. The oldest portion is dated by an inscribed brick to 1836, with an addition about 1850. The house features a Tuscan-columned porch supported on a Rusticated concrete block knee wall.
Document 14: Houses at 838-862 Brightridge Street: The Houses at 838-862 Brightridge Street in the Perry South neighborhood of Pittsburgh, Pennsylvania, USA, were built in 1887 on both sides of what was then called Brighton Place. Twelve houses were built on the north side of the street and 13 were built on the south side. They are similar in size and floor plan to the row houses on Charles Street that were also built by William A. Stone, who later became governor of Pennsylvania. The Brightridge Street row houses were listed on the National Register of Historic Places on March 1, 1984.
Document 15: 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
ground_truth: 1991
sub_queries: What state is Jacob Highbarger House located? Answer: Maryland
when did the first walmart open in Maryland Answer: 1991