Simplify the following text for a Grade 6 native English-speaking person.
Original: Mary Beatrice d'Este , the elder child of Alfonso IV , Duke of Modena , and his wife , Laura Martinozzi , was born on 5 October 1658 NS in Modena , Duchy of Modena , Italy .
Simplified: Mary Beatrice d'Este was the older child of Alfonso IV , Duke of Modena and his wife Laura Martinozzi . She was born on 5 October 1658 NS in Modena .