Given a statement and question, generate the answer to the question such that the answer is contained in the statement.

[EX Q]: statement: placental mammals give birth to vulnerable young, question: What are placental mammals?
[EX A]: vulnerable young

[EX Q]: statement: stems are green to protect themselves., question: What is green to protect themselves?
[EX A]: stems

[EX Q]: statement: freezers help food last longer, question: What helps food last longer?
[EX A]:
freezers