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: pines have a positive impact on an ecosystem. 
Question: what has a positive impact on an ecosystem?
Example Output: pines.

Example Input: Fact: Some mollusks are not easily seen with the naked eye. 
Question: What are not easily seen with the naked eye?
Example Output: mollusks.

Example Input: Fact: paper is formed by substances reacting with one another. 
Question: what is formed by substances reacting with one another?
Example Output:
paper.