Complex sentence: In 1988 Rosenborg coach Nils Arne Eggen brought him and his friend Jahn Ivar "Mini" Jakobsen from Bodø/Glimt to Rosenborg, where they won the double in their debut year in the Norwegian top division.
Split into simpler sentences: In 1988 Rosenborg coach Nils Arne Eggen brought him and his friend Jahn Ivar "Mini" Jakobsen from Bodø/Glimt to Rosenborg. At Rosenborg, Berg won the double in his debut year in the Norwegian top division.