QUESTION: Generate a question with a factual answer?

ANS: What word means using a single unaccompanied vocal melody line?

QUESTION: Generate a question with a factual answer?

ANS: What was the underlying cause of the failure on IndyMac?

QUESTION: Generate a question with a factual answer?

ANS: Hayek dedicated many of his papers to Popper based on a dedication Popper made to him in which of his work?

QUESTION: Generate a question with a factual answer?

ANS:
Besides stamps, what did the Soviet Union also create in Avicenna's honor?