Question: What is the stadium named after the largest restaurant chain in the US in the 1960s and 1970s?
Context: KFC (the name was originally an initialism for Kentucky Fried Chicken) is a fast food restaurant chain that specializes in fried chicken and is headquartered in Louisville, Kentucky, United States (US).  It is the world's second largest restaurant chain (as measured by sales) after McDonald's, with 18,875 outlets in 118 countries and territories as of December 2013 .  The company is a subsidiary of Yum!  Brands, a restaurant company that also owns the Pizza Hut and Taco Bell chains. 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. KFC is a fast food restaurant chain that specializes in fried chicken and is China's largest restaurant chain.  KFC restauruants in China are owned or franchised by Yum China, a restaurant company that also owns the Pizza Hut and Taco Bell chains in China and was spun off from Yum!  Brands in 2016. Howard Johnson's, or Howard Johnson, is an American chain of hotels, motels and restaurants located primarily throughout the United States and Canada.  Founded by Howard Johnson, it was the largest restaurant chain in the U.S. throughout the 1960s and 1970s, with more than 1,000 combined company-owned and franchised outlets. The Bawabet Dimashq (Arabic: بوابة دمشق‎ ‎ ) ("Damascus Gate"), the largest restaurant in the world, is a family owned restaurant in Damascus, Syria, that opened in 2002.  The structure cost $40 million to construct and is owned by Shaker al Samman.  The restaurant has a 54,000 sq-m dining area, 2,500 sq-m kitchen, can serve 6,014 people, and during peak operation, 1,800 staff are employed.  The restaurant has features such as waterfalls, fountains and replicas of archaeological ruins of Syria, and six culinary themed sections for Indian, Chinese, Arab, Iranian, Middle Eastern and Syrian Cuisine.  The restaurant received the title as the largest restaurant in the world by the Guinness World Records on May 29, 2008, taking the title from the Mang Gorn Luang or "Royal Dragon" restaurant in Bangkok, Thailand, which caters to up to 5,000 diners. St-Hubert BBQ Ltd is a chain of Canadian casual dining restaurants best known for its rotisserie chicken.  St-Hubert once had a presence throughout eastern Canada, but it now has few locations outside its home province of Quebec, where it remains a dominant chain.  Other locations are found in Ottawa, Cornwall, Rockland and Hawkesbury in Ontario, and Edmundston, Bathurst, Moncton and Fredericton in New Brunswick.  St-Hubert is the 16th largest restaurant chain operating in Canada. Kinnick Stadium, formerly known as Iowa Stadium, is a stadium located in Iowa City, Iowa, United States.  It is the home stadium of the University of Iowa Hawkeyes, in the sport of college football.  First opened in 1929, it currently holds up to 70,585 people, making it the 7th largest stadium in the Big Ten, and one of the 20 largest university owned stadiums in the nation.  It is named for Nile Kinnick, the 1939 Heisman Trophy winner and the only Heisman winner in university history, who died in service during World War II.  It was named Iowa Stadium until 1972, when longtime lobbying by "Cedar Rapids Gazette" sportswriter Gus Schrader successfully convinced the UI athletic board to change the name.  It is currently the only college football stadium named after a Heisman Trophy winner. TVA Credit Union Ballpark is a stadium in Johnson City, Tennessee.  It is primarily used for baseball, and is the home field of the Johnson City Cardinals minor league baseball team of the Appalachian League.  The field is named "Howard Johnson Field", after the Howard Johnson's hotel chain.  It was built in 1956 and holds 3,800 people. Meson Sandwiches is a fast-casual restaurant chain that primarily sells sandwiches, salads and breakfast items, which it serves all day long.  Based in Mayagüez, Puerto Rico El Meson Sandwiches is Puerto Rico’s largest restaurant chain.  In 2012 it was named one of the world’s top fast food chains by "Travel & Leisure" magazine. Subway is a privately held American fast food restaurant franchise that primarily sells submarine sandwiches (subs) and salads. Subway is one of the fastest-growing franchises in the world and, as of June 2017, has approximately 45,000 stores located in more than 100 countries.  More than half of the stores are located in the United States.  It is the largest single-brand restaurant chain and the largest restaurant operator in the world.
Answer: TVA Credit Union Ballpark