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: Coal is used to produce the movement of electrons by burning in coal-fire power stations. 
Question: Coal is used to produce the movement of electrons by what in coal-fire power stations?
Example Output: burning.

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

Example Input: Fact: wings are attached to the dorsal side of the insect. 
Question: What side of an insect are wings attached to?
Example Output:
dorsal.