Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.

Input: Consider Input: Fact: mammals are endothermic. 
Question: what are endothermic?

Output: mammals.


Input: Consider Input: Fact: all vertebrates have jaws. 
Question: what do all vertebrates have?

Output: jaws.


Input: Consider Input: Fact: Humans give birth to relatively large and mature infants. 
Question: What gives birth to large and relatively mature infants?


Output: humans.