QUESTION: Generate a question with a factual answer?

ANS: What did Chinese laborers do after they left that line of work?

QUESTION: Generate a question with a factual answer?

ANS: When was Northern Rock taken into public hands?

QUESTION: Generate a question with a factual answer?

ANS: How do fireworks create green sparks?

QUESTION: Generate a question with a factual answer?

ANS:
How many square miles are land in NYC?