Q: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Context: The Palace of Nations (French: Palais des Nations, pronounced: (pal de nsj)) in Geneva, Switzerland, was built between 1929 and 1938 to serve as the headquarters of the League of Nations.
Question: What year was Palace of Nations opened?
A:
1938