Generate a question with a factual answer.
Generated: Around what percentage of the Roman populace were thought to be slaves?

Generate a question with a factual answer.
Generated: What is a social concept, not a scientific one?

Generate a question with a factual answer.
Generated: How much money did Lipitor make before the patent expired?

Generate a question with a factual answer.
Generated: What program interviewed Queen on 22 September 2010?