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: Cystitis can be treated with antibiotics., question: Cystitis can be treated with what?

Answer: antibiotics

Question: statement: muscles contracting cause a person's arm to straighten, question: What causes a person's arm to straighten?

Answer: muscles contracting

Question: statement: comparators, flats, and microscopes could be used for observing materials up close, question: What could comparators, flats, and microscopes be used for?

Answer:
observing materials up close