Generate a question with a factual answer.
Generated: Under what rule did Aristotle believe a nation should be led?

Generate a question with a factual answer.
Generated: How many people lived in the cities?

Generate a question with a factual answer.
Generated: Whose letter does the introduction to On the Origin of Species refer?

Generate a question with a factual answer.
Generated: What effect does digivolution have on digimon?