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

[Q]: statement: Predators use sharp recurved nails to catch prey., question: What type of nails do predators use to catch prey?
[A]: sharp recurved nails


[Q]: statement: Air pollution contains lung irritants., question: What does air pollution contain?
[A]: lung irritants


[Q]: statement: respiration is aided by open doors, question: What aids respiration?
[A]:
open doors