Complex sentence: Oslo is an important centre of maritime knowledge in Europe and is home to approximately 1980 companies and 8,500 employees within the maritime sector, some of which are the world's largest shipping companies, shipbrokers, and insurance brokers.
Split into simpler sentences: Oslo is an important centre of maritime knowledge in Europe and is home to approximately 1980 companies and 8,500 employees within the maritime sector. Some of which are the world's largest shipping companies, shipbrokers, and insurance brokers.