Given a statement and question, generate the answer to the question such that the answer is contained in the statement.
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Question: statement: Some methods of birth control can break or be used incorrectly., question: What can break or be used incorrectly?

Answer: birth control

Question: statement: A person's arm straightens when muscles antagonistic to biceps contract, question: What straightens when muscles antagonistic to biceps contract?

Answer: arm

Question: statement: Smog is an airborne pollutant, question: Smog is what type of pollutant?

Answer:
airborne