Which airline, with the abbreviation DAT, operates two daily flights to Oslo Airport, Gardermoen? 
Danish Air Transport
Title: Oslo Airport Station
Passage: Oslo Airport Station (Norwegian: "Oslo lufthavn stasjon" ), also known as Gardermoen Station, is a railway station located in the airport terminal building of Oslo Airport, Gardermoen in Norway.  Located on the Gardermoen Line, it is served by the Airport Express Trains, express trains to Trondheim and Oslo, regional trains to Lillehammer and Skien (via Oslo) and commuter trains to Eidsvoll and Kongsberg (via Oslo).
Title: Danish Air Transport
Passage: Danish Air Transport A/S, often abbreviated DAT, is a Danish airline headquartered in Vamdrup, Kolding Municipality, operating scheduled and chartered passenger and cargo flights.
Title: Stord Airport, Sørstokken
Passage: Stord Airport, Sørstokken (Norwegian: "Stord lufthavn, Sørstokken" ; Nynorsk: "Stord Lufthamn" ; IATA: SRP, ICAO: ENSO ) is a municipal regional airport located at Sørstokken in Stord, a municipality in Hordaland county, Norway.  Located 13 km from Leirvik and on the island of Stord, it is the only airport with scheduled services in Sunnhordland.  The airport consists of a single asphalt 1460 x runway designated 14/32.  It is classified as an airport of entry.  Danish Air Transport operates up to two daily flights to Oslo Airport, Gardermoen.  Previously the airport has been served by Coast Aero Center, Fonnafly, Air Stord, Teddy Air, Widerøe and Sun Air of Scandinavia.
Danish Air Transport Stord Airport, Sørstokken