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: vibrating matter can produce sound
[EX A]: Which of the following relies on vibrating matter to work?

[EX Q]: Fact: a rainbow is formed by refraction of light by splitting light into all different colors
[EX A]: If a sunbeam shoots through a rainstorm,?

[EX Q]: Fact: cloudy means the presence of clouds in the sky
[EX A]:
On a cloudy day?