Question: From 1983 to 1995 C. Stephen Lynn was the CEO of a restaurant chain based in what city?

Context paragraphs:
Dee's Drive-In: Dee's Drive-In was a fast food hamburger drive-in restaurant chain based in Utah.  The chain was founded by Dee Frederick Anderson, who got his start selling hamburgers operating the Ute Hamburger Shop near the University of Utah in the 1920s.  Anderson opened the first Dee's Restaurant in 1932.  Dee's would evolve into two separate but related restaurant chains: Dee's Family Restaurant and Dee's Drive-In.

Sonic Drive-In: Sonic Drive-In, more commonly known as Sonic, is an American drive-in fast-food restaurant chain based in Oklahoma City, Oklahoma.  As of August 31, 2016, restaurants were in 45 U.S. states.  In 2011, it was ranked 10th in "QSR Magazine"'s rankings of the top 50 quick-service and fast-casual restaurant brands in the nation (moving the 13th for 2015 and 2016).  Known for its use of carhops on roller skates, the company annually hosts a competition to determine the top skating carhop in its system.

Klenger Burger: Klenger Burger is an Indonesian restaurant chain based in Jakarta, operated by PT Kinarya Anak Negeri.  The restaurant chain served halal hamburgers designed to suit the Indonesian palate.  The company sold a variety of burgers, including a 25 cm Raja Klenger (King Klenger) designed to serve seven people.  It also sold pizza, grilled and fried duck and chicken, and Indonesian snacks such as rempeyek and emping.

VIP's: VIP's, alternatively written Vip's, is a defunct restaurant chain in the Western United States that operated from 1968 until the late 1980s, based in Salem, Oregon.  With more than 50 locations, it was once the largest restaurant chain based in Oregon.  It was a Denny's-style restaurant, a type that was commonly known at that time as a "coffee shop" but is now more commonly known as a casual dining restaurant.  Most restaurants were located near freeways and were open 24 hours.  At its peak, the chain had locations in five states: Oregon, Washington, Idaho, Nevada and northern California.

The Works (restaurant): The Works is a Canadian restaurant chain based in Ottawa, Ontario.  The restaurant chain started by Brad Fennema in Ottawa in 2001, has grown to 27 locations across southern Ontario.

C. Stephen Lynn: C. Stephen Lynn is an American businessman and philanthropist from Tennessee.  He spent the bulk of his career in the fast food industry, serving as the Chairman and CEO of the Sonic Corporation from 1983 to 1995, Chairman and CEO of Shoney's from 1995 to 1998, and CEO of Back Yard Burgers from 2007 to 2010.  Lynn currently serves as CEO of GGR Enterprises, a motorsports marketing enterprises headquarter in North Carolina.

Salisbury House (restaurant): Salisbury House is a restaurant chain based in Winnipeg, Manitoba, Canada.  Known locally as "Sals", the chain is considered a Winnipeg institution.  The first Salisbury House restaurant was founded in Downtown Winnipeg in 1931 by Ralph Erwin (September 2, 1902 – June 5, 1983), who named the venture after the salisbury steak.  Erwin disliked the term 'hamburger' so named his burger a "nip" to market his hamburgers as a small 'nip' or bite of Salisbury steak.

Chefette: 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.

Todai (restaurant): Todai is a restaurant chain based in the United States.  As of 2016, the chain had over 19 restaurants in the United States, 7 restaurants in South Korea, one restaurant in Hong Kong, one restaurant in Canada, one restaurant in Indonesia, one restaurant in Singapore and one restaurant in Malaysia.

Fazoli's: Fazoli's is an Italian-American fast casual restaurant chain based out of Lexington, Kentucky.  It was founded in 1988 and is now owned by Seed Restaurant Group, Inc.  Today, there are more than 200 Fazoli's located nationwide with plans to expand overseas.  The restaurant chain specializes in Italian cuisine and dishes.  Carl Howard is the company's president and CEO.

Supporting paragraphs: C. Stephen Lynn Sonic Drive-In
Answer: Oklahoma City