Title: Indigenous peoples of the Americas.
Question: Why did the U.S. pass the Indian Arts and Crafts Act of 1990?

Title: Daylight saving time.
Question: What year did a change in DST policy cost North America somewhere between $500 million and $1 billion in extra work?

Title: Beer.
Question: What percentage of alcohol by volume does beer achieve when it is re-pitched with champagne yeast?

Title: Sino-Tibetan relations during the Ming dynasty.
Question:
Who did Gushi Khan enthrone the ruler of Tibet?