QUESTION: Generate a question with a factual answer?

ANS: As of 2000, how many people lived in Richmond per square kilometer?

QUESTION: Generate a question with a factual answer?

ANS: To what does "The Railbelt" refer?

QUESTION: Generate a question with a factual answer?

ANS: How large is South Tucson?

QUESTION: Generate a question with a factual answer?

ANS:
With whom did Kublai Khan have a unique relationship with?