Generate a question with a factual answer.
Generated: What was Queen Victoria's nickname?

Generate a question with a factual answer.
Generated: When was the crew chosen to participate on the Apollo 11 mission?

Generate a question with a factual answer.
Generated: What is produced by a vacuum and used in electron beam welding and vacuum frying?

Generate a question with a factual answer.
Generated: What does the immediate return system mean?