Complex sentence: By 1962, nine public libraries and the bookmobiles were part of the Volusia County Library System, and within the next four years Holly Hill, Ormond Beach, and Orange City joined the system.
Split into simpler sentences: By 1962, nine public libraries and the bookmobiles were part of the Volusia County Library System. Within the next four years Holly Hill, Ormond Beach, and Orange City joined the system.