Complex sentence: The son of Henry Benedict Wall, Esq., Patrick was educated at Downside Abbey, and served in the Royal Marines 1935-1950, being raised to the rank of Major in 1944.
Split into simpler sentences: The son of Henry Benedict Wall, Esq., Patrick was educated at Downside Abbey. He served in the Royal Marines 1935-1950, being raised to the rank of Major in 1944.