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.

[EX Q]: Fact: the moon does not contain water
[EX A]: Which doesn't contain water?

[EX Q]: Fact: slope is a measure of the difference in elevation between one part of the land and another part of the land
[EX A]: slope is a measure of the difference in elevation from the top to the base of a?

[EX Q]: Fact: the sun is a source of light called sunlight
[EX A]:
Sunlight is a source of light from what?