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: humans use lipids to store energy. 
Question: what uses lipids to store energy?

Output: humans.


Input: Consider Input: Fact: dogs require nutrients to grow and heal. 
Question: what requires nutrients to grow and heal?

Output: dogs.


Input: Consider Input: Fact: recycling has a positive impact on the earth. 
Question: Recycling has what kind of impact on the earth?


Output: good.