I want to know the answer to the following question:
When was Oklahoma's centennial year?
All the background I'm provided with is that "Annual ethnic festivals and events take place throughout the state such as Native American powwows and ceremonial events, and include festivals (as examples) in Scottish, Irish, German, Italian, Vietnamese, Chinese, Czech, Jewish, Arab, Mexican and African-American communities depicting cultural heritage or traditions.". Is that enough to answer the question?