You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Private_school

Context:
Private schools are often Anglican, such as King's College and Diocesan School for Girls in Auckland, St Paul's Collegiate School in Hamilton, St Peter's School in Cambridge, Samuel Marsden Collegiate School in Wellington, and Christ's College and St Margaret's College in Christchurch; or Presbyterian, such as Saint Kentigern College and St Cuthbert's College in Auckland, Scots College and Queen Margaret College in Wellington, and St Andrew's College and Rangi Ruru Girls' School in Christchurch. Academic Colleges Group is a recent group of private schools run as a business, with schools throughout Auckland, including ACG Senior College in Auckland’s CBD, ACG Parnell College in Parnell, and international school ACG New Zealand International College. There are three private schools (including the secondary school, St Dominic's College) operated by the Catholic schismatic group, the Society of St Pius X in Wanganui.

Question:
What group operates St Dominic's College in Wanganui?

Society of St Pius X