QUESTION: Generate a question with a factual answer?

ANS: What did Zhu Yuanzhang build around the city of Nanjing?

QUESTION: Generate a question with a factual answer?

ANS: LED efficacy is inversely proportional to what?

QUESTION: Generate a question with a factual answer?

ANS: How idealistic were samurai?

QUESTION: Generate a question with a factual answer?

ANS:
What did architects often neglect in their pursuit of aesthetics?