Simplify the following text for a Grade 4 native English-speaking person.
Original: In 1551 she married William the Silent in Buren , and thereby he earned the titles Lord of Egmond and Count of Buren .
Simplified: In 1551 she married William the Silent in Buren . Because she was the Lady of Egmond and Countess of Buren , he became Lord of Egmond and Count of Buren .