Complex sentence: In 1921, a collection of some 45,000 books and manuscripts arrived from Italy, purchased from Conte Antonio Cavagna Sangiuliani di Gualdana, focused on northern Italian history and includes items dating from the twelfth to the early twentieth century.
Split into simpler sentences: In 1921, a collection of some 45,000 books and manuscripts arrived from Italy, purchased from Conte Antonio Cavagna Sangiuliani di Gualdana. This collection focuses on northern Italian history and includes items dating from the twelfth to the early twentieth century.