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.

[Q]: Fact: Mineral graphite can pierce the skin surface. 
Question: What can pierce the skin surface?
[A]: Mineral graphite.


[Q]: Fact: warblers are nocturnal and travel long distances at night. 
Question: What are nocturnal and travel long distances at night?
[A]: warblers.


[Q]: Fact: the Earth revolving around the Sun causes daylight changes. 
Question: The Earth revolving around the Sun causes?
[A]:
daylight changes.