Question: McKids was a chain of clothing stores marketed to children and operated by an American hamburger and fast food restaurant chain founded in what year?

Context paragraphs:
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.

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.

Fatburger: Fatburger Inc. is an American fast casual restaurant chain.  Its tagline is "The Last Great Hamburger Stand".  While it is a fast food restaurant, the food is cooked and made to order.  Some Fatburger restaurants have a liquor license, as well as Fat Bars.  Its franchise headquarters are in Beverly Hills, California.  In addition to the United States, the chain operates in 19 other countries.

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.

Wendy's: Wendy's is an American international fast food restaurant chain founded by Dave Thomas on November 15, 1969, in Columbus, Ohio, United States.  The company moved its headquarters to Dublin, Ohio, on January 29, 2006.  As of 2016, Wendy's was the world's third largest hamburger fast food chain with 6,500+ locations, following Burger King and McDonald's.  On April 24, 2008, the company announced a merger with Triarc Companies Inc., a publicly traded company and the parent company of Arby's.  Despite the new ownership, Wendy's headquarters remained in Dublin.  Previously, Wendy's had rejected more than two buyout offers from Triarc.  Following the merger, Triarc became known as Wendy's/Arby's Group, and later as The Wendy's Company.

McDonald's: McDonald's is an American hamburger and fast food restaurant chain.  It was founded in 1940 as a barbecue restaurant operated by Richard and Maurice McDonald, in San Bernardino, California.  In 1948, they reorganized their business as a hamburger stand, using production line principles.  The first McDonald's franchise using the arches logo opened in Phoenix, Arizona in 1953.  Businessman Ray Kroc joined the company as a franchise agent in 1955 and subsequently purchased the chain from the McDonald brothers.  Based in Oak Brook, Illinois, McDonald's confirmed plans to move its global headquarters to Chicago by early 2018.

McKids: McKids was a chain of clothing stores marketed to children and operated by McDonald's Corporation through a partnership with Sears Roebuck.  In July 1987, Sears began selling the McKids line of children's clothing.  In December 1988, Sears opened the first 7 free-standing McKids stores.  In early 1991, all 47 free-standing McKids stores were closed.  The McKids line of clothing continued to be sold at Sears stores.  In 1997, McKids clothing began to be sold exclusively at Wal-Mart.  McDonald's exclusivity agreement with Wal-Mart ended at the end of 2003, and in 2004 the McKids brand was launched internationally, with 15 stores being opened in China.

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.

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.

Goli Vada Pav: Goli Vada Pav is an Indian ethnic fast food restaurant chain originated from Mumbai, Maharashtra, India.  It was founded in 2004 as a vadapav restaurant by Venkatesh Iyer and Shivadas Menon.  Today, Goli Vada Pav has 300 stores in 100 cities across 20 states of India.  The expanse is from Gorakhpur in North to Calicut in South and Porbandar in West to Kolkata in East.  The Basket of products include varieties of vadapav, vada rolls, currys pavs and desserts.  It is positioned as an alternative to traditional fast food and rivals the conventional burger.  The franchise retail chain store has now grown to a 55 crores business which plans to make a multi-fold jump to 350 crores with the opening of 1000 outlets pan-India.

Supporting paragraphs: McKids McDonald's
Answer: 1940