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: kidney infection can be treated with drugs, question: What can be used to treat kidney infection?

Answer: drugs


Question: statement: a pulley is used for lifting mass, question: What is a pulley used for?

Answer: lifting mass


Question: statement: Synapsids were a further evolution in a chain of mammalian animals, question: What was a further evolution in a chain of mammalian animals?

Answer:
Synapsids