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: Vertebrates have a complete digestive system and a closed circulatory system. 
Question: vertebrates have a complete digestive system and a what?

Output: closed circulatory system.


Input: Consider Input: Fact: Cars damage the environment by causing an excess of contaminants. 
Question: How do cars damage the environment?

Output: Emitting an excess of contaminants.


Input: Consider Input: Fact: Reptile parents abandon their eggs. 
Question: What parents abandon their eggs?


Output: reptile.