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.
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.
Salad and Go is a fast food restaurant specializing in healthy options using whole, natural, and organic ingredients executed with a small footprint drive-thru concept.
 Founded by Roushan and Tony Christofellis in 2013 the company is based in Gilbert, Arizona and as of July 2017, has grown to ten locations around the Phoenix area.
 In early 2017 the company launched Meals and Go, a customizable grab and go meal plan option.
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.
When In-N-Out Burger first opened in 1948, the company only provided a basic menu of burgers, fries and beverages.
 The foods it prepared were made on-site from fresh ingredients, including its french fries which were sliced and cooked to order.
 Unlike other major competitors in the hamburger fast food restaurant business (Burger King, McDonald's and Wendy's), as the chain expanded over the years, it has not added products such as chicken or salads to its menu or changed its preparation methods.
Chefette Restaurants is the largest fast food restaurant chain based in the Caribbean island nation of Barbados.
 Currently operating throughout the island in 14 locations, Chefette is known for its broasted chicken meals as well as a local curried-'meat + vegetable' (similar to the European Gyro) roll-up or wrap, locally known as a roti.
 Chefette was founded by a Trinidadian businessman named Assad John Haloute, who migrated to Barbados in 1971.
 In 1972, he opened the first Chefette Restaurant at Fontabelle, St. Michael.
 As the success of the chain grew over the next three decades, the restaurant chain continued its expansion.
 The company's trademark colours are yellow and purple.
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.
Marrybrown Sdn Bhd (doing business as Marrybrown) is a Malaysian-based halal-certified fast food restaurant chain established in 1981.
 It was the first local fast food chain to franchise its business in Malaysia with more than 130 restaurants locally.
 Marrybrown has over 350 international outlets serving fried chicken, burgers, finger food, desserts, and beverages aside from serving Malaysian local dishes such as seafood, rice-based products, noodles and porridge.
 The Malaysian national rice dish, nasi lemak became the feature list on the menu as 'Nasi Marrybrown'.
Western-style fast food in China is a recent phenomenon, dating back only to January 1984 when McDonald's opened its first outlet in Taipei, Taiwan Province in the Republic of China.
 In October 1987, Kentucky Fried Chicken, still the most popular fast food chain in China, established its first restaurant in the People's Republic of China (mainland area), located in Beijing.
 KFC was later followed by McDonald's, which remains China's number two foreign fast food option.
 In addition to American style fast food, China has many local options, including a slew of restaurants that attempt to imitate fast food, particularly KFC.
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.

Question: Which fast food restaurant, founded in ohio, added salad and chicken options after expansion?
Answer: Wendy's