Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

[Q]: Fact: wind and rain cause erosion
[A]: The face of the sphinx has changed from?


[Q]: Fact: farming cause nutrients in the soil to decrease
[A]: a soil in a village seems to be nutrient deficient, what might have happened?


[Q]: Fact: nutrients are a source of energy for living things
[A]:
What are nutrients a source of energy for?


