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: iron is always magnetic
[EX A]: A person wants to mine something that will attract metals. The person decides to search out some?

[EX Q]: Fact: the respiratory system takes in oxygen from the air
[EX A]: The substance that the respiratory system takes in from the air is released by?

[EX Q]: Fact: grey clouds appear before precipitation
[EX A]:
In the intermediary before rain falls, observers may note?