Complex sentence: Today Sundsvall is not only dominated by the pulp and paper industry, and the aluminium production, but also by banks, insurance companies, telecommunications administration and a number of large public data-processing centres such as the national social insurance board.
Split into simpler sentences: Today Sundsvall is not only dominated by the pulp and paper industry, and the aluminium production. There are also banks, insurance companies, telecommunications administration and a number of large public data-processing centres such as the national social insurance board.