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: ears are used for hearing. 
Question: What are ears used for?
Example Output: to hear.

Example Input: Fact: Plants photosynthesize during the day but not during the night. 
Question: Plants do what during the day but not during the night?
Example Output: photosynthesize.

Example Input: Fact: lymphocytes are small. 
Question: what size are lymphocytes?
Example Output:
small.