Complex sentence: The Diocese of Sion (,,) is a Roman Catholic ecclesiastical territory in the canton of Valais, Switzerland it is the oldest bishopric in the country and one of the oldest north of the Alps.
Split into simpler sentences: The Diocese of Sion (,,) is a Roman Catholic ecclesiastical territory in the canton of Valais, Switzerland. It is the oldest bishopric in the country and one of the oldest north of the Alps.