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

Example Input: Paleontologists are earth scientists.
Example Output: Paleontologists are what?

Example Input: Pencil lead is from a hard mineral.
Example Output: What type of mineral does pencil lead come from?

Example Input: Muscles in the upper arm shrinking causes a person 's elbow to straighten.
Example Output:
What causes a person's elbow to straighten?