Question: What airport forms the hub of the airline for which the Sulimov dog was developed?
Context: AirAsia Berhad () is a Malaysian low-cost airline headquartered near Kuala Lumpur, Malaysia.  It is the largest airline in Malaysia by fleet size and destinations.  AirAsia Group operates scheduled domestic and international flights to more than 165 destinations spanning 25 countries.  Its main hub is klia2, the low-cost carrier terminal at Kuala Lumpur International Airport (KLIA) in Sepang, Selangor, Malaysia.  Its affiliate airlines Thai AirAsia, Indonesia AirAsia, Philippines AirAsia, and AirAsia India have hubs in Don Mueang International Airport, Soekarno–Hatta International Airport, Ninoy Aquino International Airport, and Kempegowda International Airport respectively, while its sister airline, AirAsia X, focuses on long-haul routes.  AirAsia's registered office is in Petaling Jaya, Selangor while its head office is at Kuala Lumpur International Airport. Airline hubs or hub airports are used by one or more airlines to concentrate passenger traffic and flight operations at a given airport.  They serve as transfer (or stop-over) points to get passengers to their final destination.  It is part of the hub-and-spoke system.  An airline operates flights from several non-hub (spoke) cities to the hub airport, and passengers traveling between spoke cities need to connect through the hub.  This paradigm creates economies of scale that allow an airline to serve (via an intermediate connection) city-pairs that could otherwise not be economically served on a non-stop basis.  This system contrasts with the point-to-point model, in which there are no hubs and nonstop flights are instead offered between spoke cities.  Hub airports also serve origin and destination (O&D) traffic. British Airways (BA) is the flag carrier airline of the United Kingdom.  It is the largest airline in the UK based on fleet size, international flights and international destinations.  British Airways was considered the largest UK airline by passenger numbers from its creation in 1974 until 2008, when it was displaced by low-cost rival EasyJet.  Since its inception, British Airways has been centred at its main hub at London Heathrow Airport, with a second major hub at London Gatwick Airport. Tallinn Airport (Estonian: Tallinna lennujaam , IATA: TLL, ICAO: EETN ) or Lennart Meri Tallinn Airport (Estonian: Lennart Meri Tallinna lennujaam ) is the largest airport in Estonia and serves as a hub for the national airline Nordica, as well as the secondary hub for AirBaltic and LOT Polish Airlines.  It was also the home base of the now defunct national airline Estonian Air.  Tallinn Airport is open to both domestic and international flights.  It is located 2.7 NM southeast of the centre of Tallinn on the eastern shore of Lake Ülemiste.  It was formerly known as Ülemiste Airport. The Sulimov dog (Russian: "Собакa Сулимова"), also known as the Shalaika (Russian: "Шалайка"), is a Russian jackal-dog hybrid originating from an initial hybrid between two Lapponian Herders and two Turkmen golden jackals.  The breed was developed by Klim Sulimov for Aeroflot airline security.  He is described as a Senior Research Assistant at the D.S. Likhachev Scientific Research Institute for Cultural Heritage and Environmental Protection.  The primary use of this breed has been to aid airport security as sniffer dogs. Quoting Sulimov, "My dogs combine the qualities of Arctic reindeer herding dogs, which can work in temperatures as low as -70°C, and jackals which enjoy the heat up to +40°C.  They're perfect for our country." Bishop International Airport (IATA: FNT, ICAO: KFNT, FAA LID: FNT) is a commercial and general aviation airport located in Flint, Michigan.  It is named after banker and General Motors board member Arthur Giles Bishop (April 12, 1851 – January 22, 1944), who donated 220 acres of his farmland for the airport in 1928.  The third busiest airport in Michigan, it surpassed competitor MBS International Airport in terms of airline operations in 2002.  In 2007, 1,071,238 passengers used Bishop International Airport; in 2011, 938,914 passengers used the airport.  It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a small hub primary commercial service facility.  The airport is currently served by several passenger airlines: Allegiant Air, Southwest Airlines and Delta Air Lines operate mainline service out of the airport, as well as affiliates of Delta Connection, United Express and American Eagle.  Additionally, FedEx Express and a FedEx Feeder affiliate operate cargo services out of the airport.  Accompanying the airlines is fixed-base operator Av Flight that handles both general aviation and airline operations and the flight school American Wings Aviation.  Bishop International Airport is in southwestern Flint, and is surrounded by Flint Township to the north, east and west; and Mundy Township to the south. Philadelphia International Airport (IATA: PHL, ICAO: KPHL, FAA LID: PHL) , often referred to just by its IATA code PHL, is a major airport in Philadelphia, Pennsylvania, United States, and is the largest airport in the Delaware Valley region and in the state.  The airport is a major international hub for American Airlines and a regional cargo hub for UPS Airlines.  Philadelphia International Airport is also a focus city for ultra low cost airline Frontier Airlines.  The airport has service to destinations in the United States, Canada, the Caribbean, Latin America, Europe, and the Middle East.  Most of the airport property is located in Philadelphia proper.  The international terminal and the western end of the airfield are located in Tinicum Township, Delaware County.  PHL covers 2,302 acres (932 ha). Olympic Air S.A. (Greek: Ολυμπιακή ) is a regional airline, a subsidiary of the Greek airline carrier Aegean Airlines.  It was initially formed from the privatization of the former Greek national carrier Olympic Airlines, a company that carried the name Olympic Airways from 1957 to the beginning of the 21st century.  Olympic Air commenced limited operations on 29 September 2009, after Olympic Airlines ceased all operations, with the official full-scale opening of the company taking place two days later on 1 October 2009.  Its main hub is Athens International Airport, with Rhodes International Airport serving as secondary hub.  The airline's headquarters are in Building 57 at Athens International Airport in Spata, and its registered seat is in Koropi, Kropia, East Attica. America West Airlines was a U.S. airline headquartered in Tempe, Arizona.  Their main hub was at Sky Harbor Airport in Phoenix, Arizona, with a secondary hub at Las Vegas McCarran International Airport in Las Vegas, Nevada.  The airline became part of the US Airways Group after it acquired the larger airline in 2005 and adopted the US Airways brand name.  America West was the second largest low-cost carrier in the U.S. after Southwest Airlines and served approximately 100 destinations in the US, Canada, and Mexico.  Service to Europe was provided through codeshare partners.  In March 2005, the airline operated a fleet of 132 aircraft, with a single maintenance base at Sky Harbor Airport in Phoenix.  Regional jet and/or turboprop feeder flights were operated on a code sharing basis by Mesa Airlines and Chautauqua Airlines as America West Express. PJSC AeroflotRussian Airlines (Russian: ПАО "Аэрофло́т-Росси́йские авиали́нии" , "ПAO Aeroflot-Rossiyskiye avialinii" ) (), commonly known as Aeroflot ( or ) (Russian: Аэрофлот , English translation: "air fleet", ] ), is the flag carrier and largest airline of the Russian Federation.  The carrier is an open joint stock company that operates domestic and international passenger and services, mainly from its hub at Sheremetyevo International Airport.
Answer: Sheremetyevo International Airport