Generate a question with a factual answer.
Generated: The inclination of the roof cannot exceed how much?

Generate a question with a factual answer.
Generated: What did Qi Jiguang's private army do?

Generate a question with a factual answer.
Generated: What department store was founded in 1853?

Generate a question with a factual answer.
Generated: What rely on presenting scenes directly to the eye for their own visibe sake?