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: Absorbing energy causes metal objects to expand. 
Question: Metal expands when it does what?

Output: absorbs energy.


Input: Consider Input: Fact: animals with calcite shells form large colonies in shallow tropical water. 
Question: Animals with _ form large colonies in shallow tropical water?

Output: calcite shells.


Input: Consider Input: Fact: prokaryotes have cilia. 
Question: what do prokaryotes have?


Output: cilia.