Complex sentence: He travelled to England in 1913 where he opened a restaurant in Birmingham and helped to look after his uncle's business interests which included a restaurant in Regent Street and contracts with the British Admiralty.
Split into simpler sentences: He travelled to England in 1913 where he opened a restaurant in Birmingham. In London he helped to look after his uncle's business interests which included a restaurant in Regent Street and contracts with the British Admiralty.