Generate a question with a factual answer.
Generated: When did Virgil's reputation as a great magician begin?

Generate a question with a factual answer.
Generated: When did royal weddings begin at the church?

Generate a question with a factual answer.
Generated: Where are the Athabasca oil sands located?

Generate a question with a factual answer.
Generated: The value quoted here for the Planck constant is based on a measurement in what year?