TASK DEFINITION: Given a statement and question, generate the answer to the question such that the answer is contained in the statement.
PROBLEM: statement: Muscles in the upper arm lengthen a person's elbow., question: What lengthens a person's elbow?

SOLUTION: Muscles

PROBLEM: statement: Vehicle brakes rely on the tire traction to reduce speed, question: What do brakes use to reduce speed?

SOLUTION: tire traction

PROBLEM: statement: An ant has an offspring which is the larval and pupal process of the ant after hatching, question: What process does an ant have after hatching?

SOLUTION:
larval and pupal