Complex sentence: The diocese of Baguio, one of the older ecclesiastical territories in the Philippines, was erected as the Apostolic Prefecture of Mountain Provinces on July 15,1932, on territory split from the then bishopric of Nueva Segovia.
Split into simpler sentences: The Diocese of Baguio, one of the oldest ecclesiastical territories in the Philippines, was erected as the Apostolic Prefecture of Mountain Provinces on July 15,1932. The territory that the Diocese of Baguio now claims was split from the then bishopric of Nueva Segovia.