Question: How many stored does the American fast food restaurant franchise that sponsored Subway 400 have? 

full_context: Document 1: Hungry Howie's Pizza: Hungry Howie's Pizza & Subs, Inc., also known as Hungry Howie's Pizza, is a franchise and the 11th largest pizza chain in the United States, with over 550 locations. Hungry Howie's products include pizza, calzone-style subs, chicken wings and tenders, bread, salads, and brownies. Its headquarters are located in Madison Heights, Michigan in Metro Detroit.
Document 2: Subway (restaurant): 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.
Document 3: Subway 400: The Subway 400 was the second race of the NASCAR Winston Cup Series season until 2004, held a week after the Daytona 500. This 400-mile (644 km) annual race was sponsored by Subway and was held at North Carolina Speedway ("The Rock") since 1966. From 1966 to 1995, a 500-mile (805-km) race was held; the race was known as the Peach Blossom 500 (1966), the Carolina 500 (1967–1985), and the Goodwrench 500 (1986–1995). In 1996, the race was shortened to its current distance of 400 miles; the 400 mile race was called the Goodwrench Service 400 (1996–1997), the GM Goodwrench Service Plus 400 (1998), the Dura Lube/Big K 400 (1999), the Dura Lube/Kmart 400 (2000), the Dura Lube 400 (2001), and the Subway 400 (2002–2004).
Document 4: Subway $5 footlong promotion: The Subway $5 footlong promotion was a promotion by the fast food restaurant chain Subway, which was launched in the United States in 2008 by offering footlong (30 cm) submarine sandwiches for US$5. Coinciding with the Great Recession, the promotion was very successful for the chain, spurring competitors to make similar moves to cut prices to attract customers. The promotion also helped start an ongoing trend of round price points on consumer goods. However, the price increased 20% to $6 in 2014 and subsequently the price was raised to $7 in 2017.
Document 5: Monster Energy NASCAR Cup Series: The Monster Energy NASCAR Cup Series (often shortened to the Cup Series) is the top racing series of the National Association for Stock Car Auto Racing (NASCAR). It is named for the current sponsor, Monster Energy, but has been known by other names in the past. The series began in 1949 as the Strictly Stock Series, and from 1950 to 1970 it was known as the Grand National Series. In 1971, when the series began leasing its naming rights to the R. J. Reynolds Tobacco Company, it was referred to as the Winston Cup Series. A similar deal was made with Nextel in 2003, and it became the Nextel Cup Series (2004–2007). Sprint acquired Nextel in 2005, and in 2008 the series was renamed the Sprint Cup Series, which lasted until 2016. In December 2016, it was announced that Monster Energy would become the new title sponsor starting in 2017.
Document 6: KFC: KFC, until 1991 known as Kentucky Fried Chicken, is an American fast food restaurant chain that specializes in fried chicken. Headquartered in Louisville, Kentucky, it is the world's second-largest restaurant chain (as measured by sales) after McDonald's, with almost 20,000 locations globally in 123 countries and territories as of December 2015 . The chain is a subsidiary of Yum! Brands, a restaurant company that also owns the Pizza Hut and Taco Bell chains.
Document 7: Subway Israel: Subway Israel (Hebrew: סאבוויי‎ ‎ ) was a fast food sandwich chain, an international franchise of Subway. Opening in 1992, they expanded to 23 branches around Israel before they closed in 2004.
Document 8: KFC in Japan: 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.
Document 9: Carolina Dodge Dealers 400: The Carolina Dodge Dealers 400 was the annual spring NASCAR Sprint Cup race held at Darlington Raceway in Darlington, South Carolina, USA. A 100 mi race was held in May at the track in 1952, however the event did not become a regular one on the NASCAR schedule until 1957, as a 300 mi race in the Convertible Division, known as the Rebel 300. In 1966, the race was expanded to 400 mi , and in 1973 to 500 mi . In 1994, the race was returned to 400 miles. In 2005, as part of the settlement of the Ferko lawsuit and as part of a schedule realignment, Darlington was forced to contract to one race date, with the 500 mile race (the famous Southern 500) moving to Mother's Day weekend. The 400 mile race was eliminated, although Dodge's sponsorship was transferred to the 500 miler.
Document 10: 2014 Bojangles' Southern 500: The 2014 Bojangles' Southern 500, the 58th running of the event that traces its lineage to the 1957 Rebel 300, was a NASCAR Sprint Cup Series stock car race held on April 12, 2014, at Darlington Raceway in Darlington, South Carolina. The race was contested over 374 laps – extended from 367 laps due to two attempts at a green–white–checker finish – on the 1.366 mi oval, it was the eighth race of the 2014 NASCAR Sprint Cup Series. Kevin Harvick of Stewart-Haas Racing won the race, his second win of the season and first at Darlington, while Dale Earnhardt, Jr. finished second. Jimmie Johnson, Matt Kenseth, and Greg Biffle rounded out the top five. The race was also the first Darlington race won by a polesitter since Dale Jarrett, in the 1997 Rebel (then a 400-mile race). The top rookies of the race were Kyle Larson (8th), Austin Dillon (11th), and Justin Allgaier (23rd). It was the longest race in Darlington Raceway history.
Document 11: Fast casual restaurant: A fast casual restaurant, found primarily in the United States, does not offer full table service, but promises higher quality food than other fast food restaurants (with fewer frozen or processed ingredients). It is an intermediate concept between fast food and casual dining, and usually priced accordingly. The category is exemplified by chains such as Boston Market, Bruegger's, Captain D's, Chipotle Mexican Grill, Dig Inn, El Pollo Loco, Newk's Eatery, Noodles & Co., Panera Bread, Pizza Ranch and Vapiano.
Document 12: Auto Club 400: The Auto Club 400 is a 400-mile (643.737 km) Monster Energy NASCAR Cup Series stock car race held at the Auto Club Speedway in Fontana, California. Prior to 2005, the race was held in late April or early May, and until 2010, the race was run at a length of 500 miles. When the NASCAR Realignment of 2005 was made, the race was moved to February and the week following the Daytona 500. The February date stayed until the 2011 season when the date changed to March. After being pleased with the results of the shortening of the track's former fall race date, the Pepsi Max 400, from 500 to 400 miles Auto Club Speedway decided to do the same thing to its spring race.
Document 13: Food City 500: The Food City 500 is an annual 500-lap, 266.5 mi annual Monster Energy NASCAR Cup Series points race held at the Bristol Motor Speedway in Bristol, Tennessee. This is one of two NASCAR races held at Bristol, the other being the Bass Pro Shops NRA Night Race, and is considered one of NASCAR's best races. It was the first venue of the 2007 NASCAR schedule to host the fifth-generation NASCAR premiership race car, a race won by Kyle Busch.
Document 14: Budweiser 400: The Budweiser 400 was an annual summer NASCAR Winston Cup race held from 1970 to 1988 at Riverside International Raceway in Riverside, California, United States. A 400-mile race was also run at the track in November 1963. The race distance was 400 miles until 1976 when it was shortened to 249 miles (400 kilometers). The other race at Riverside, the Winston Western 500, was held in January from 1965 to 1981 and November from 1981 to 1987.
Document 15: Subway 400: The Subway 400 was the second race of the NASCAR Winston Cup Series season until 2004, held a week after the Daytona 500. This 400-mile (644 km) annual race was sponsored by Subway and was held at North Carolina Speedway ("The Rock") since 1966. From 1966 to 1995, a 500-mile (805-km) race was held; the race was known as the Peach Blossom 500 (1966), the Carolina 500 (1967–1985), and the Goodwrench 500 (1986–1995). In 1996, the race was shortened to its current distance of 400 miles; the 400 mile race was called the Goodwrench Service 400 (1996–1997), the GM Goodwrench Service Plus 400 (1998), the Dura Lube/Big K 400 (1999), the Dura Lube/Kmart 400 (2000), the Dura Lube 400 (2001), and the Subway 400 (2002–2004).
ground_truth: 45,000