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: Mutations can be detected by analysis on gene abnormalities. 
Question: Which process of gene abnormalities can mutations be detected?

Output: analysis.


Input: Consider Input: Fact: cattle can have a negative impact on the environment. 
Question: what can have a negative impact on the environment?

Output: cattle.


Input: Consider Input: Fact: engines cause something to move. 
Question: What can cause something to move?


Output: engines.