Complex sentence: Edward Chichester, 4th Marquess of Donegall (11 June 1799--20 January 1889) was born in Great Cumberland Place, London, and was educated at Eton and Trinity College Dublin, graduating BA in 1822.
Split into simpler sentences: Edward Chichester, 4th Marquess of Donegall (11 June 1799--20 January 1889) was born in Great Cumberland Place, London. He was educated at Eton and Trinity College Dublin, graduating BA in 1822.