Generate a question with a factual answer.
Generated: How or why do variations enter a witness text?

Generate a question with a factual answer.
Generated: Trade between what two countries typically went through ancient Kathmandu?

Generate a question with a factual answer.
Generated: Centrifugation and pressing are prime examples of what?

Generate a question with a factual answer.
Generated: Why did Laemmle change his position on "unclean pictures"?