Simplify the following text for a Grade 10 native English-speaking person.
Original: For example County Dublin was broken into three : Dun Laoghaire-Rathdown , Fingal , and South Dublin - the City of Dublin had existed for centuries before .
Simplified: In the Republic , for example , the change broke Dublin County into four parts : Dublin City , DÃ n Laoghaire - Rathdown , Fingal , and South Dublin .