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: magnets are used to navigate oceans. 
Question: What are used to navigate oceans?
Example Output: magnets.

Example Input: Fact: Repellents can stop harm caused by flea bites. 
Question: How can you prevent harm caused by flea bites?
Example Output: Using repellent.

Example Input: Fact: birds have a positive impact on plants. 
Question: what has a positive impact on plants?
Example Output:
birds.