Given a statement, generate a question such that the answer is contained in that statement.

Ex Input:
bear teeth are important for digestion.

Ex Output:
What are important for digestion?


Ex Input:
A wheeled automobile requires smooth surfaces.

Ex Output:
What does a wheeled automobile require?


Ex Input:
Muscles contracting makes a person's elbow straighten.

Ex Output:

What kind of straightens a person's body?