TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Healthy lungs is necessary in a person who wishes to play wind instruments.

SOLUTION: What is necessary in a person who wishes to play wind instruments?

PROBLEM: Opaque is the term for matter that does not let any light pass through.

SOLUTION: What is the term for matter that does not let any light pass through?

PROBLEM: The lens of the eye is a(n) convex shape.

SOLUTION:
What shape is the lens of the eye?