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: infection can cause inflammation. 
Question: _can cause inflammation?
Example Output: Infection.

Example Input: Fact: A person's elbow straightens when muscles antagonistic to biceps contract. 
Question: A person's elbow straightens when muscles antagonistic to what contract?
Example Output: biceps.

Example Input: Fact: Plant reproduction requires animals. 
Question: What does plant reproduction require?
Example Output:
animals.