Complex sentence: Walter Devereux, 1st Earl of Essex KG (1541--22 September 1576), an English nobleman, was the eldest son of Sir Richard Devereux and Dorothy Hastings.
Split into simpler sentences: Walter Devereux, 1st Earl of Essex KG (1541--22 September 1576), an English nobleman. Walter was the eldest son of Sir Richard Devereux and Dorothy Hastings.