Complex sentence: Sir David St Vincent "Dai" Llewellyn, 4th Baronet (born 2 April 1946) is a Welsh socialite, was born in Aberdare, the son of 1952 Summer Olympics gold medallist showjumper Sir Harry Llewellyn, 3rd Baronet.
Split into simpler sentences: Sir David St Vincent "Dai" Llewellyn, 4th Baronet (born 2 April 1946) is a Welsh socialite. He was born in Aberdare the son of 1952 Summer Olympics gold medallist showjumper Sir Harry Llewellyn, 3rd Baronet.