Given a statement, generate a question such that the answer is contained in that statement.
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Question: metal, stainless steel and plastic are used to support towers.

Answer: What type of steel is used to support towers?

Question: Therapsids became more mammal-like as they continued to change.

Answer: What became more mammal-like as they continued to change?

Question: fish have skeletons

Answer:
What do fish have?