QUESTION: Generate a question with a factual answer?

ANS: What is the main function of direction lanterns?

QUESTION: Generate a question with a factual answer?

ANS: How did the NBC Othacoustic curve relate to the NAB curve?

QUESTION: Generate a question with a factual answer?

ANS: How many times did Sumerian farmers plow, harrow and rake the ground?

QUESTION: Generate a question with a factual answer?

ANS:
Why did the Chinese government ban Windows 8 based products?