Question: Which nationality is the island where the Copenhagen Airport is located?

Context paragraphs:
Copenhagen Airport: Copenhagen Airport, Kastrup (Danish: "Københavns Lufthavn, Kastrup" ) (IATA: CPH, ICAO: EKCH ) is the main international airport serving Copenhagen, Denmark, the entire Zealand, the Øresund Region, and a large part of southern Sweden (not only Scania).  It is the largest airport in the Nordic countries with 29 million passengers in 2016 and one of the oldest international airports in Europe.  It is the third-busiest airport in Northern Europe, and by far the busiest for international travel in Scandinavia.

Lufthavnen Station: Lufthavnen Station (The Airport Station) is a rapid transit station of the Copenhagen Metro, located at Copenhagen Airport on the island of Amager.  The station is the terminus of the M2 line and is located in fare zone 4.

List of Copenhagen Metro stations: There are 22 stations in the Copenhagen Metro, a driverless rapid transit system serving Copenhagen, Frederiksberg and Tårnby in Denmark.  Nine of these metro stations are underground, twelve are elevated, and one is street-level.  Christianshavn Station offers transfer between the system's two metro lines (M1 and M2), which share track between Vanløse and Christianshavn stations.  From Christianshavn, M1 branches south traveling to Vestamager Station, while M2 heads southeast to Lufthavnen Station, which serves Copenhagen Airport.  Flintholm, Nørreport and Vanløse stations offer transfer to the S-train, the city's other rapid transit system which the Copenhagen Metro was built to supplement.  Transfer from the Copenhagen Metro to regional trains is possible at Lufthavnen, Nørreport and Ørestad stations.  The City Circle Line, which is under construction and scheduled to open in 2019, is planned to have 17 stations, with transfer between the current and new lines at Frederiksberg and Kongens Nytorv stations.  The new lines will have a stop at Copenhagen Central Station (København H), the largest train station in Denmark.

Peberholm: Peberholm ("Pepper Islet", Swedish: "Pepparholm" ), is a small artificial island in the Danish part of the Øresund strait, created as part of the Øresund Bridge connecting Denmark with Sweden.  Peberholm is close to the small natural island of Saltholm ("Salt Islet"), and was named to complement it.  Area:325 acres.

Københavns Lufthavne: Københavns Lufthavne is a public limited company that operates two airports in Copenhagen, Denmark, Copenhagen Airport and Roskilde Airport.  In addition, the company previously held a 49% stake in Newcastle International Airport and 10% of Aeropuertos del Sureste that operated nine airports in Mexico.

Roskilde Airport: Roskilde Airport (IATA: RKE, ICAO: EKRK) , officially known as Copenhagen Airport, Roskilde (Danish: "Københavns Lufthavn, Roskilde" ), is located 4 nautical miles (7 km) southeast of Roskilde near the town Tune.  It was opened in 1973 as the first of three planned relief airports around Copenhagen.  These plans were shelved shortly after, and the two other relief airports never made it past the planning stage.  The airport is owned and operated by Københavns Lufthavne A/S (Copenhagen Airports) which also operates Copenhagen's major airport at Kastrup.  The airport had 25,053 passengers in 2003.

Tårnby: Tårnby is a town in Denmark, the seat of Tårnby Municipality in the Capital Region of Denmark.  It is located approximately 6.5 km south of Copenhagen on the island of Amager.  Neighbouring settlements include the Copenhagen suburb of Sundbyvester to the north and Kastrup to the south.  Copenhagen Airport is situated to the east of Tårnby.  It includes the islets Saltholm and Peberholm.

Copenhagen Airport, Kastrup Station: Copenhagen Airport, Kastrup Station (Danish: "Københavns Lufthavn, Kastrup Station" ) is a railway station in Tårnby, Denmark, served by DSB’s regional trains including the Oresundtrain network.  The nearby Lufthavnen metro station is served by the Copenhagen Metro’s line M2.  The reconstructed railway station opened on 28 September 2007, and Metro service began the following month.  The stations take their names from Copenhagen Airport, to which they are connected.  It is linked to Ørestad station on the M1 line by DSB regional trains.  It is located in fare zone 4.

Kastrup: Kastrup is a suburb of Copenhagen, Denmark, situated on the east coast of Amager in Tårnby Municipality.  It is best known as the site of Copenhagen Airport.  In Danish, the airport is often called "Kastrup Lufthavn" (Kastrup Airport) or "Københavns Lufthavn, Kastrup" (Copenhagen Airport, Kastrup).  The population of Kastrup is approximately 43 000.

World Trade Center (Copenhagen): World Trade Center Copenhagen is a proposed complex in Ørestad, a development zone between Copenhagen's city center and Copenhagen Airport in Denmark.  Designed by Kim Utzon, son of architect Jørn Utzon, who designed the Sydney Opera House.  The centre is planned to comprise three high-rise office blocks of 20 stories each, with the rest of the building between 7 and 9 floors in height.

Supporting paragraphs: Tårnby Peberholm
Answer: Danish