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: Aging is associated with apoptosis. 
Question: What stage is associated with apoptosis?

Output: aging.


Input: Consider Input: Fact: Birds have backbones. 
Question: What animals have a backbone?

Output: Birds.


Input: Consider Input: Fact: an herbicide poisons plants. 
Question: What doesn't protect plants?


Output: herbicide.