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 Input:
Fact: when light enters the eye through the pupil , that light falls on the retina

Ex Output:
A retina may be illuminated by?


Ex Input:
Fact: pollution is when humans pollute the environment with pollutants

Ex Output:
Pollution is?


Ex Input:
Fact: An example of hunting is an otter cracking open clams with a rock

Ex Output:

What is an example of hunting?