Complex sentence: Christen Christensen (9 September 1845--16 November 1923) was a Norwegian shipyard and ship owner as well as the founder and chairman of the world's largest whaling company, A/S Oceana.
Split into simpler sentences: Christen Christensen (9 September 1845--16 November 1923) was a Norwegian shipyard and ship-owner. He was the founder and chairman of the world's largest whaling company, A/S Oceana.