Complex sentence: Bjarne Berg-Sæther was first elected mayor of Sandtorg in 1948 and held this office until, as part of the merging of the cities of Harstad, Trondernes and Sandtorg, he also became the mayor of the new city of Harstad (1964-68).
Split into simpler sentences: Bjarne Berg-Sæther was first elected mayor of Sandtorg in 1948 and held this office until, as part of the merging of the cities of Harstad, Trondenes and Sandtorg. He also became the mayor of the new city of Harstad (1964-68).