Q: Answer this question: when did classification of races begin?
A: First used to denote national affiliations, the term began to be used to relate to physical traits in the 17th century.

Question: Answer this question: What are the busiest airports in the world?
Answer: The definition of the world's busiest airport has been specified by the Airports Council International in Geneva, Switzerland.

[Q]: Answer this question: how much total wealth in USA?
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[A]: Including human capital such as skills, the United Nations estimated the total wealth of the United States in 2008 to be $118 trillion.

input: Please answer the following: Answer this question: what day is the federal holiday for Martin Luther King Jr.?
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output: It is observed on the third Monday of January each year, which is around the time of King's birthday, January 15.

Please answer this: Answer this question: WHO IS HENRY SAMPSON JR.?
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Answer: Henry T. Thomas Sampson, Jr. (born in Jackson, Mississippi in 1934) is an African-American inventor.

Question: Answer this question: what does oklahoma produce?
Answer:
A major producer of natural gas , oil , and agriculture, Oklahoma relies on an economic base of aviation, energy, telecommunications, and biotechnology .