Question: Which Cathedral is the seat of the Bishop of Portsmouth, Portsmouth Cathedral or Ely Cathedral?

Related documents: [0]  [DOC] Ely Cathedral is an Anglican cathedral in the English city of Ely, Cambridgeshire. [END] 
[1]  [DOC] The Cathedral Church of St Thomas of Canterbury, commonly known as Portsmouth Cathedral, is an English cathedral church. It is the cathedral of the Church of England Diocese of Portsmouth and is located in the centre of Old Portsmouth. It is the seat of the Bishop of Portsmouth. [END]  
Answer: Portsmouth Cathedral
Portsmouth Cathedral