Complex sentence: Born in Hill Street in London, Herbert was the oldest son of Henry Herbert, 1st Earl of Carnarvon, and Lady Elizabeth Alicia Maria Wyndham, the oldest daughter of Charles Wyndham, 2nd Earl of Egremont.
Split into simpler sentences: Born in Hill Street in London, he was the oldest son of Henry Herbert, 1st Earl of Carnarvon. His mother Lady Elizabeth Alicia Maria was the oldest daughter of Charles Wyndham, 2nd Earl of Egremont.