I want to know the answer to the following question:
Over how many years did the change to national standards undertaken at Notre Dame in the early 20th century take place?
All the background I'm provided with is that "In 1919 Father James Burns became president of Notre Dame, and in three years he produced an academic revolution that brought the school up to national standards by adopting the elective system and moving away from the university's traditional scholastic and classical emphasis.". Is that enough to answer the question?
Answer: yes