Complex sentence: Isambard Kingdom Brunel set an example, designing three great steamships: the SS Great Western, the SS Great Britain and the SS Great Eastern--the first two being built at Bristol shipyards and the third at Millwall, London.
Split into simpler sentences: Isambard Kingdom Brunel set an example, designing three great steamships: the SS Great Western, the SS Great Britain and the SS Great Eastern. First first two being built at Bristol shipyards and the third at Millwall, London.