Complex sentence: The United States Air Force sponsored the largest number of Paperclip scientists: between 1945 and 1952, they imported 260, of whom 36 returned to Germany and 1 reemigrated to Argentina.
Split into simpler sentences: The United States Air Force sponsored the largest number of Paperclip specialists. Between 1945 and 1952, they imported 260, of whom 36 returned to Germany and 1 reemigrated to Argentina.