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: male dogs use natural aphrodisiacs in urine to mark their territory. 
Question: what do male dogs use in their urine to mark their territory?

Output: natural aphrodisiacs.


Input: Consider Input: Fact: an animal requires food to grow and heal. 
Question: What does an animal require food for?

Output: to grow and heal.


Input: Consider Input: Fact: Removing habitats has a negative impact on an ecosystem?. 
Question: What is bad for ecosystems?


Output: Removing habitats.