Question: Who founded an American privately held regional fast food restaurant chain, based in San Antonio, Texas, that specializes in hamburgers, that has a location in an outdoor retail center which goes by the name Richardson Square?

Context paragraphs:
Richardson Square Mall: Richardson Square Mall was an enclosed shopping center located in Richardson, Texas, United States.  Richardson Square Mall demolition began in June 2007.  Now located in its place is an outdoor retail center which goes by the name Richardson Square.  The retail center includes Super Target with a Starbucks and Pizza Hut Express inside, Sears, Ross Dress for Less, Anna's Linens, and a Lowe's home improvement store.  The center also includes pad sites such as Panda Express, Chick-fil-A, Whataburger, Sonic Drive-In, and a Bank of America.

Nirula's: Nirula's is India's oldest fast food restaurant chain.  Based in North India and most popular in NCR Delhi, it was Delhi's first fast food restaurant, opening in Connaught Place in 1977.  Today it has over 70 outlets in NCR Delhi, Bihar, Haryana, Madhya Pradesh, Punjab, Rajasthan and Uttar Pradesh states, offering a “Desi” version of Western fast food items.  Nirula's success has led them to branch out into other ventures which include, ‘Potpourri’, an Indian cuisine, casual dining restaurant chain; ‘Nirula's 21’, ice cream parlour chain, in addition to pastry shops and two hotels in Noida and Panipat.  Recently Nirula's opened its first franchise in Patna, their first outlet in the entire east zone.

Whataburger: Whataburger is an American privately held regional fast food restaurant chain, based in San Antonio, Texas, that specializes in hamburgers.  The company, founded by Harmon Dobson and Paul Burton, opened its first restaurant in Corpus Christi, Texas, in 1950.  The chain is owned and operated by the Dobson family, along with 25 franchisers.  s of 2017 , there are currently 809 Whataburger stores across the Southeastern and Southwestern United States regions.

Kelly's Roast Beef: Kelly's Roast Beef is a regional fast food restaurant chain located in Massachusetts.  It is known for its roast beef sandwiches and lobster rolls as well as other seafood.  It was founded in 1951 in the city of Revere, Massachusetts on Revere Beach shoreline by two partners, Frank V. McCarthy and Raymond Carey.  Neither partner wanted to be the namesake of the restaurant, so they decided to name it after a mutual friend, Thomas Kelley, a florist from Dorchester.

Restaurant Brands International: Restaurant Brands International is a Canadian multinational fast food company.  Formed in 2014 by the $12.5 billion merger between American fast food restaurant chain Burger King and the Canadian coffee shop and restaurant chain Tim Hortons, and expanded by the 2017 purchase of Louisiana-based and themed Popeyes Louisiana Kitchen, the company is the third-largest operator of fast food restaurants in the world.  The company is based alongside Tim Hortons in Oakville, Ontario, but both chains retain their existing operations and headquarters in Oakville and Miami respectively.  The merger focused primarily on expanding the international reach of the Tim Hortons brand, and providing financial efficiencies for both companies.

Fast food restaurant: A fast food restaurant, also known as a quick service restaurant (QSR) within the industry, is a specific type of restaurant that serves fast food cuisine and has minimal table service.  The food served in fast food restaurants is typically part of a "meat-sweet diet", offered from a limited menu, cooked in bulk in advance and kept hot, finished and packaged to order, and usually available for take away, though seating may be provided.  Fast food restaurants are typically part of a restaurant chain or franchise operation that provisions standardized ingredients and/or partially prepared foods and supplies to each restaurant through controlled supply channels.  The term "fast food" was recognized in a dictionary by Merriam–Webster in 1951.

List of Burger King products: When the predecessor of international fast food restaurant chain Burger King (BK) first opened in 1955, its menu predominantly consisted of hamburgers, French fries, soft drinks, milkshakes, and desserts.  After being acquired by its Miami, Florida franchisees and renamed in 1954, BK began expanding its menu by adding the Whopper.  The company did not add another permanent hamburger to its menu until the introduction of the Big King sandwich in 1996 in response to McDonald's Big Mac sandwich.  The company began experimenting with premium hamburgers, made from higher quality ingredients, in 1978 with the introduction of its Specialty Sandwich product line.  The products were some of the first designed by a fast food restaurant chain that were intended to capture the adult market, members of which would be willing to spend more on a higher-quality product.  However, it wasn't until 2002 when the company began to work on a premium burger in earnest.  On the value side, Burger King first started offering sliders to its menu in the mid-1980s and offered them off and on for the next twenty years.

Harvey's: Harvey's is a fast food restaurant chain that operates in Canada, with locations in every province.  It serves hamburgers, hot dogs, french fries, onion rings, and other traditional fast food fare.  The chain is owned by Cara Operations.  Harvey's is the second-largest Canadian-established restaurant chain in the country behind Tim Hortons, and is the fourth-largest burger chain in Canada.

Cook Out (restaurant): Cook Out is an American privately owned fast food restaurant chain in Alabama, Georgia, Kentucky, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Mississippi, and Maryland.  Founded in Greensboro, North Carolina, the chain has since expanded and now has drive-thru restaurants in over one hundred cities.  Most locations consist of a double drive-thru and outdoor seating, while many newer locations also offer traditional indoor seating.  The chain itself has grown in size with many locations now spread throughout Virginia.

Pal's: Pal's Sudden Service, normally called Pal's for short, is a regional fast food restaurant chain located in northeast Tennessee and southwestern Virginia, with stores concentrated in the Tri-Cities, Tennessee metro region.  The first Pal's opened in 1956 in Kingsport, Tennessee a year after the founder of Pal's, Fred "Pal" Barger, attended a National Restaurant Convention in Chicago and met Ray Kroc and Fred Turner, observing the construction and equipment they used for the first McDonald's restaurant.  Pal's CEO is Thom Crosby.

Supporting paragraphs: Richardson Square Mall Whataburger
Answer: Harmon Dobson and Paul Burton