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

[Q]: statement: Human infants at birth weigh 7 pounds, infants smaller or larger are less likely to survive, question: What is the weight of human infants at birth?
[A]: 7 pounds

[Q]: statement: optical instruments help explain the natural world, question: What helps explain the natural world?
[A]: optical instruments

[Q]: statement: Viruses are not affected by drugs that helps prevent infection, question: What helps prevent infection?
[A]:
drugs