Complex sentence: The collection was expanded in 1922 with items originating largely in what is now the Democratic Republic of the Congo, and in 1923 the museum hosted one of the first exhibitions of African art in the United States.
Split into simpler sentences: The collection was expanded in 1922 with items originating largely in what is now the Democratic Republic of the Congo. In 1923 the museum hosted one of the first exhibitions of African art in the United States.