QUESTION: Generate a question with a factual answer?

ANS: Where do the European pied flycatcher breed?

QUESTION: Generate a question with a factual answer?

ANS: How does Einstein advocate Mach's principle?

QUESTION: Generate a question with a factual answer?

ANS: In what city and state did the arena football test game take place?

QUESTION: Generate a question with a factual answer?

ANS:
How prevalent is Principia Mathematica today?