Complex sentence: The same principle was chosen for the airport rail link, and the state railways, the Norwegian State Railways (NSB) created the subsidiary limited company NSB Gardermobanen AS on 24 November 1992 to perform the construction of the line.
Split into simpler sentences: The same principle was chosen for the airport rail link. The state railways, the Norwegian State Railways (NSB) created the subsidiary limited company NSB Gardermobanen AS on 24 November 1992 to perform the construction of the line.