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: Water is essential for all known living things in the universe., question: What is essential for all known living things in the universe?

Answer: Water

Question: statement: Dragonflies have two pairs of wings for flight, question: How many pairs of wings do dragonflies have?

Answer: two pairs

Question: statement: keratin protects fish from sharks and parasites and reduce friction with the water, question: What protects fish from sharks and parasites?

Answer:
keratin