Simplify the following text for a Grade 4 native English-speaking person.
Original: Her mother died in 1671 , and her father remarried in 1673 , taking as his second wife the Catholic Princess Mary of Modena , who was only four years older than Mary .
Simplified: Mary 's mother died in 1671 , and her father married again in 1673 . He took Mary of Modena , a Catholic , as his second wife .