Question: How many franchise restaurants has the sub sandwich shop in the Fashion Outlets of Niagara Falls opened?

Context paragraphs:
Niagara Frontier Transportation Authority: The Niagara Frontier Transportation Authority (NFTA) is a public authority responsible for the public transportation oversight of Erie and Niagara counties in the state of New York.  The NFTA, as an authority, oversees a number of subsidiaries, including the NFTA Metro bus and rail system, the Buffalo-Niagara International Airport, the Niagara Falls International Airport and NFTA Small Boat Harbor.  The NFTA Metro bus and rail system is a multi-modal agency, utilizing various vehicle modes (diesel bus, diesel-hybrid bus, CNG bus, light rail and cut-away van), using the brand names: NFTA Metro Bus, NFTA Metro Rail, NFTA Metrolink and NFTA PAL (Para-transit Access Line).  In addition, the NFTA also owns and manages a number of properties, including the Buffalo Metropolitan Transportation Center in Downtown Buffalo (which serves as the agency's headquarters); the Niagara Falls Transportation Center on Factory Outlet Blvd. the Portage Road Transit Center in Niagara Falls; and a number of strategically located bus loops and transit centers in the Buffalo Niagara region.  Of note, many of the bus loops have been in continuous operation since the days of the International Railway Company, a predecessor to the NFTA.  Agency-wide, the NFTA employs 1,500 full-time and part-time employees.  There are three business centers that operate as the NFTA organization: Surface Transportation, which handles ground transportation throughout Erie and Niagara counties, Aviation, which handles air related business at the Buffalo-Niagara International Airport and Niagara Falls International Airport and Property Risk/Management, which operates the NFTA-Boat Harbor and handles other properties that are owned and/or operated by the NFTA.

Niagara Aerospace Museum: The Niagara Aerospace Museum is an aviation museum located in Niagara Falls, New York, in the old terminal building of the Niagara Falls International Airport.  The museum has been located in a number of places in the Niagara Falls/Buffalo area.  It had been located in the Niagara Office Building in downtown Niagara Falls and relocated in 2008 to the site of the then HSBC center on the waterfront in Buffalo, NY.  In the summer of 2013, the museum moved to its current location.

Fashion Outlets of Niagara Falls: Fashion Outlets of Niagara Falls, (formerly Niagara Factory Outlet Mall, Niagara Factory Outlets, Prime Outlets of Niagara Falls, and Niagara Falls Mall), is an outlet mall serving Niagara Falls, New York, surrounded by many big-box centers and numerous chain restaurants including Longhorn Steakhouse, Five Guys Burgers and Fries, Applebees, Firehouse Subs, Chipotle Mexican Grill, and the big-box plaza Lasalle Center.

Niagara Falls, New York: Niagara Falls ( ) is a city in Niagara County, New York, United States.  As of the 2010 census, the city had a total population of 50,193, down from the 55,593 recorded in the 2000 census.  It is adjacent to the Niagara River, across from the city of Niagara Falls, Ontario, and named after the famed Niagara Falls which they share.  The city is within the Buffalo–Niagara Falls Metropolitan Statistical Area as well as the Western New York region.

Cousins Subs: Cousins Submarines, better known as Cousins Subs, is a Milwaukee, Wisconsin-based sub sandwich shop who was founded in 1972.  Cousins Subs is a regional chain with restaurants in Wisconsin and Arizona.

Niagara Falls Suspension Bridge: The Niagara Falls Suspension Bridge, which stood from 1855 to 1897 across the Niagara River, was the world's first working railway suspension bridge.  It spanned 825 ft and stood 2.5 mi downstream of Niagara Falls, where it connected Niagara Falls, Ontario, to Niagara Falls, New York.  Trains used the upper of its two decks, pedestrians and carriages the lower.  The brainchild of Canadian politicians, the bridge was built by one American and one Canadian company.  It was most commonly called the Suspension Bridge; other names included Niagara Railway Suspension Bridge, Niagara Suspension Bridge, and its official American name, the International Suspension Bridge.

Niagara Falls National Heritage Area: Niagara Falls National Heritage Area is a federally designated National Heritage Area encompassing the Niagara Falls region of the U.S. State of New York.  The heritage area includes the communities of Niagara Falls, Youngstown and Lewiston.  The designation provides a framework for the promotion and interpretation of the area's cultural and historic character, and the preservation of the natural and built environment.  The heritage area designation recognizes the area's importance to Native Americans, to early European explorers of America, the American Revolution, the War of 1812 and the area's role in the Underground Railroad.  The area also recognizes the contribution of the Niagara Falls region to the industrialization of the United States, as well as the development of Niagara Falls as a protected natural area.

Firehouse Subs: To date, Firehouse Subs has opened 1050 franchise restaurants across 44 states, Puerto Rico, Canada, and Mexico.

Niagara Falls Memorial Arena: The Niagara Falls Memorial Arena was an arena located in Niagara Falls, Ontario, Canada.  It was built in 1950 and had a capacity of approximately 3,000.  The arena was home to various ice hockey teams in the past, including the Niagara Falls Thunder and the Niagara Falls Flyers.  It also served as the home of the Niagara Falls Canucks, a team in the Greater Ontario Junior B Hockey League.  The city has built the Gale Centre to replace the Memorial Arena.  The Gale Centre has a similar capacity in one of the four ice pads, with the other three having a modest capacity for recreational hockey and skating league purposes.  The Gale Centre has become a community center, of sorts, for ice-based activities with offices for figure skating and house-league hockey organizations.  The Niagara Falls Memorial Arena was demolished to make room for a parking lot upon completion of the new four-pad arena in 2009.  Updates on the project and the state of the old Memorial Arena can be found on the City of Niagara Falls website at www.niagarafalls.ca

La Salle High School (Niagara Falls, New York): La Salle Senior High School was a multi-story Post-Modern era high school in Niagara Falls, New York built in 1956 and was run by the Niagara Falls City School District.  It was closed in 2000 and was subsequently merged with the "old" Niagara Falls High School to create the "new" Niagara Falls High School due to declining student enrollment associated with the declining population of Niagara Falls.  It is not to be confused with the former La Salle Junior High School, which is now the La Salle Preparatory School, also located in Niagara Falls.  The school was razed in 2001 to eventually make way for a Wal-Mart and the associated plaza buildings that include a Hobby Lobby and which also includes a Sam's Club, both located on what was once sports fields and viewing stands.  The school was located at the eastern front end of the large property and on prime real estate on Military Road almost directly opposite Wegmans, which is a busy shopping corridor which also includes the expanding Fashion Outlets Mall.  The school's nickname was the "Explorers", which is now being used by the preparatory school.  The site had once been farmers fields, with the Star-Lite Drive-In also nearby.

Supporting paragraphs: Fashion Outlets of Niagara Falls Firehouse Subs
Answer: 1050