I want to know the answer to the following question:
How many years was Knute Rockne head coach at Notre Dame?
All the background I'm provided with is that "During his 13 years the Irish won three national championships, had five undefeated seasons, won the Rose Bowl in 1925, and produced players such as George Gipp and the "Four Horsemen".". Is that enough to answer the question?
Answer: yes