instruction:
Given a statement and question, generate the answer to the question such that the answer is contained in the statement.
question:
statement: cloning allows us to make copies of traits, question: What allows us to make copies of traits?
answer:
cloning

question:
statement: stems are green to protect themselves., question: What is green to protect themselves?
answer:
stems

question:
statement: some therapsids became more mammal-like as they continued to evolve, question: How did some therapsids become?
answer:
mammal