Complex sentence: Paulusheim is rooted in a boarding school of the small Italian community of Masio near Alessandria which the Pallottines had to leave in 1915 because of the war.
Split into simpler sentences: Paulusheim is rooted in a boarding school of the small Italian community of Masio near Alessandria. In 1915, Pallottines had to leave Masio because of the war.