QUESTION: Generate a question with a factual answer?

ANS: What selling methods did the Marble Palace use?

QUESTION: Generate a question with a factual answer?

ANS: What is thought to possibly cause neurobehavioral alterations?

QUESTION: Generate a question with a factual answer?

ANS: What was the population of Nanjing in 2010?

QUESTION: Generate a question with a factual answer?

ANS:
What flew by Neptune in 1989?