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: a computer controls a robot
[EX A]: What is essential for a robot to possess to walk up a flight of stairs?

[EX Q]: Fact: farming changes the environment
[EX A]: plant life vessels can be harvested in the ground which will change the?

[EX Q]: Fact: magnifying makes seeing small things easier through using a microscope
[EX A]:
I can use a microscope to?