Complex sentence: For the next 28 years she served as a herring fishing vessel, before Amundsen bought her in 1900 from Asbjørn Sexe of Ullensvang, Norway, for his forthcoming expedition to the Arctic Ocean.
Split into simpler sentences: For the next 28 years she served as a herring fishing vessel. In 1900, Amundsen bought her from Asbjørn Sexe of Ullensvang, Norway, for his forthcoming expedition to the Arctic Ocean.