Simplify the following text for a Grade 9 native English-speaking person.
Original: The minster is the seat of the Archbishop of York , the second-highest office of the Church of England , and is the cathedral for the Diocese of York ; it is run by a dean and chapter under the Dean of York .
Simplified: It is the ` seat ' of the Archbishop of York , the second-ranked religious official of the Church of England . The Minster is run by a Chapter ( committee ) under the Dean of York , who manages the affairs of the Minster .