Complex sentence: Lucy Hay, Countess of Carlisle (1599--November 5,1660), was an English socialite known for her beauty and wit and involved in many political intrigues during the English Civil War.
Split into simpler sentences: Lucy Hay, Countess of Carlisle (1599--November 5,1660), was an English socialite known for her beauty and wit. She was involved in many political intrigues during the English Civil War.