TASK DEFINITION: Given a statement, generate a question such that the answer is contained in that statement.
PROBLEM: Muscles in the upper arm shrinking causes a person 's elbow to straighten.

SOLUTION: What causes a person's elbow to straighten?

PROBLEM: Antibiotics and vaccines are being stockpiled against another potential danger in the environment

SOLUTION: What are being stockpiled against another potential danger in the environment?

PROBLEM: Frogs croak to alert other frogs that is their territory

SOLUTION:
Frogs croak to what?