input question: Generate a question about the topic "Demand curve" whose answer would be: In economics , the demand curve is the graph depicting the relationship between the price of a certain commodity and the amount of it that consumers are willing and able to purchase at that given price..???
output answer: when does a demand curve shift??

Generate a question about the topic "Sonic boom" whose answer would be: A sonic boom is the sound associated with the shock waves created by an object traveling through the air faster than the speed of sound..
----
Answer: what creates sonic boom?

Q: Generate a question about the topic "Climate of Antarctica" whose answer would be: Antarctica has the lowest naturally occurring temperature ever recorded on the ground on Earth: 89.2 C (128.6 F) at Vostok Station ..
A: what is the lowest temperature ever recorded in antarctica?

Question: Generate a question about the topic "Area code 479" whose answer would be: Area code 479 is the telephone area code serving thirteen counties in northwest Arkansas , including the cities of Fort Smith , Fayetteville , Springdale , Rogers and Bentonville : the second, third, fourth, eighth and tenth-largest cities in the state, respectively..
Answer: what area code is 479?

[Q]: Generate a question about the topic "Fret" whose answer would be: A fret is a raised element on the neck of a stringed instrument ..
****
[A]: what is a fret on a guitar?

Problem: Given the question: Generate a question about the topic "Blood urea nitrogen" whose answer would be: The liver produces urea in the urea cycle as a waste product of the digestion of protein ..
++++++++++++++++++++++++++++++++
The answer is:
what is blood urea?