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.

Example Input: Fact: Mineral graphite can pierce the skin surface. 
Question: What can pierce the skin surface?
Example Output: Mineral graphite.

Example Input: Fact: penguins are endothermic tetrapod vertebrates. 
Question: what are endothermic tetrapod vertebrates?
Example Output: penguins.

Example Input: Fact: Mutations are required for species to change over time. 
Question: The changes in species that have been seen over time required?
Example Output:
mutations.