Complex sentence: He is a local player from the club Trosvik I.F. in Fredrikstad in which many Fredrikstad youngsters have their roots, for instance Tarik Elyounoussi and Lasse Staw.
Split into simpler sentences: He is a local player from the club Trosvik I.F. in Fredrikstad. The same club in which many Fredrikstad youngsters have their roots, for instance Tarik Elyounoussi and Lasse Staw.