QUESTION: Generate a question with a factual answer?

ANS: What is the Nanjing Library's ranking in China?

QUESTION: Generate a question with a factual answer?

ANS: What does UNTAG stand for?

QUESTION: Generate a question with a factual answer?

ANS: Why are some leeches endangered?

QUESTION: Generate a question with a factual answer?

ANS:
How much of Houston's total area is water?