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

statement: respiration is essential, question: What is essential?
respiration

statement: In the puberty stage is a time of significant mental, emotional and social modification., question: What stage is a time of significant mental, emotional and social modification?
puberty

statement: Antarctica is too cold to provide overwintering shelter for some species., question: What is Antarctica supposed to be to provide overwintering shelter for some species?

too cold