Question: How many stores are in the major shopping centre that is served by the Garden City bus station?

full_context: Document 1: Garden City bus station: Garden City bus station is located in Brisbane, Australia serving the suburb of Upper Mount Gravatt and Westfield Garden City. It opened on 22 April 1999.
Document 2: Westfield Parramatta: Westfield Parramatta is a shopping centre in Parramatta, a city within the Greater Sydney Metropolitan area Sydney, New South Wales, Australia. The centre is owned and managed by The Westfield Group. In July 2014, the Westfield Group became two companies Scentre Group and Westfield Corporation. This shopping centre is now managed by Scentre Group. It has a net leasable area of approximately 137,407m² and contains 498 shops built over five levels, making it Australia's fourth largest shopping centre by Gross Leasable Area (GLA).
Document 3: Westfield Eastgardens: Westfield Eastgardens is an Australian shopping centre in the Sydney suburb of Eastgardens. The centre was the largest shopping centre in Australia when it opened in September 1987. The centre is owned by the Terrace Tower Group but operated and managed on a long term agreement by the Scentre Group. The centre's major tenants include three supermarkets, a department store, three discount department stores and a cinema.
Document 4: Swansea bus station: Swansea bus station, or Swansea city bus station, is a bus station serving Swansea, Wales. It lies immediately to the west of the Quadrant Shopping Centre. The bus station also has a taxi rank to the south.
Document 5: Newport (Isle of Wight) bus station: Newport bus station, on the Isle of Wight is located at Orchard Street in Newport town centre. Recent redevelopment has seen the former 1960s-built South Street bus station demolished, to make way for a new row of shops, and the current facility built behind that site. Newport is used as the hub of Southern Vectis's network of bus routes, so the majority of routes use Newport bus station, currently 11 out of 14. On 1 July 2007 the bus station became a no smoking area in its entirety.
Document 6: Westfield Geelong: Westfield Geelong is a shopping centre located in the Geelong CBD in Victoria, Australia which was opened in 1988. It was formerly known as Westfield Bay City before the 2008 redevelopment, and as Bay City Plaza before being acquired by the Westfield Group in 2003. The centre is located on the northern side of Malop Street opposite the Market Square shopping complex (the two of which together make up Geelong's Central Shopping Complex), and is bounded by Moorabool Street, Yarra Street (although since redevelopment the centre now extends East of Yarra Street via a flyover), Malop Street and Brougham Street. The centre has completed its major redevelopment, including the expansion over Yarra Street via a flyover.
Document 7: Old Townsville railway station: Old Townsville railway station formerly the Great Northern railway station, is a three-storey, red brick structure on Flinders Street in Townsville CBD, Queensland, Australia. The original terminus for The Great Northern Railway, the station became an important in the economic growth of Townsville during the early 20th century. The building is featured in a number of famous photos taken at celebrations of victory following World War II. A new station to service Townsville was built in the early 21st century and the platform is used for displays of historical photographs and articles. The building still houses Queensland Rail administrative offices.
Document 8: Mount Gravatt, Queensland: Mount Gravatt is the name of both a major suburb of Brisbane, Queensland, Australia and a prominent hill in this suburb. The suburb is situated in the south-east of the city and was one of Brisbane's largest. This was before it was divided into Mount Gravatt East, Upper Mount Gravatt and Mount Gravatt South; the last being changed to Wishart in the early 1990s. At the 2011 Australian Census the suburb recorded a population of 3,238.
Document 9: Westfield Group: Westfield Group was an Australian shopping centre company that existed from 1960 to 2014, when it split into two independent companies: Scentre Group, which now owns and operates the Australian and New Zealand Westfield shopping centre portfolio; and Westfield Corporation which owns and operates the UK, Europe and US portfolio.
Document 10: Westfield Fountain Gate: Westfield Fountain Gate is a super-regional shopping centre located in Narre Warren in the outer south-eastern suburbs of Melbourne, Australia. When measured by floor area, it is the second largest shopping centre in Australia.
Document 11: Booragoon bus station: Booragoon bus station is a Transperth bus station located next to the Garden City Shopping Centre in Booragoon Western Australia. It has 13 stands and is served by seven Transperth routes operated by Transdev WA.
Document 12: Buses in Sydney: Buses account for close to six per cent of trips each day in the Australian city of Sydney, New South Wales, forming a key part of the city's public transport system. The network initially evolved from a privately operated system of feeder services to railway stations in the outer suburbs, and a publicly operated network of bus services introduced to replace trams in the inner suburbs. The bus network has undergone major reform in recent years, with the New South Wales Government taking responsibility for route and fare-setting, opening contracts for most routes up to competitive tendering, and introducing more cross-regional services.
Document 13: The Gabba: The Brisbane Cricket Ground, commonly known as the Gabba, is a major sports stadium in Brisbane, the capital of Queensland, Australia. The nickname Gabba derives from the suburb of Woolloongabba, in which it is located.
Document 14: Westfield Tea Tree Plaza: Westfield Tea Tree Plaza is a large shopping centre located in Modbury serving as a shopping hub for Adelaide's growing north eastern suburbs. It is linked to the city by Adelaide's unique O-Bahn system, which terminates at the Tea Tree Plaza Interchange. There is a smaller shopping centre building called Tea Tree Plus slightly to the north of the main centre. Major tenants include Myer, Harris Scarfe, Target, Kmart, BIG W, Woolworths, Coles, Aldi and Hoyts Cinemas. With 245 stores, Tea Tree Plaza is the second largest shopping centre in Adelaide, only Westfield Marion is larger.
Document 15: Westfield Garden City: Westfield Garden City, better known as Garden City, is one of Brisbane's major shopping centres, located in the suburb of Upper Mount Gravatt. The centre is operated by Westfield, and previously operated by AMP Limited before the takeover in 2003. The shopping centre currently has 440 specialty stores, cafes, restaurants and other services and food vendors.
ground_truth: 440