QUESTION: Generate a question with a factual answer?

ANS: How were most elevators built before 1939 powered?

QUESTION: Generate a question with a factual answer?

ANS: The Volta lab improved the phonograph by replacing tinfoil with what substance?

QUESTION: Generate a question with a factual answer?

ANS: What did Eastern Nigeria want to call itself as an independent nation?

QUESTION: Generate a question with a factual answer?

ANS:
What was the name of the engineer involved in the construction of the Eddystone Lighthouse?