Text: A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex.

Question: is the tip of a cone a vertex?
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Answer: yes

Text: In 2006, the first publication of experimental transplantation of bioengineered bladders appeared in The Lancet. The trial involved seven people with spina bifida between the ages of four and nineteen who had been followed for up to five years after surgery to determine long-term effects. The bladders were prepared and the trial run by a team of biologists at the Wake Forest University School of Medicine and Boston Children's Hospital led by Professor Anthony Atala.

Question: is there such a thing as a bladder transplant?
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Answer: yes

Text: The economic problem is most simply explained by the question: ''How do we satisfy unlimited wants with limited resources?'' The premise of the economic problem model is that wants are constant and infinite due to constantly changing demands (often closely related to changing demographics of the population), but resources in the world to satisfy human wants are always limited to the amount of natural or human resources available. The economic problem and methods to curb it--revolve around the idea of choice in prioritizing which wants can be fulfilled and what to produce for the economy.

Question: can there be an economy without economic problem?
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Answer: no

Text: Status as a natural-born citizen of the United States is one of the eligibility requirements established in the United States Constitution for holding the office of President or Vice President. This requirement was intended to protect the nation from foreign influence.

Question: does the us vice president have to be a natural born citizen?
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Answer:
yes