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: Mutations that lead to cancer usually occur in genes aiding in mitosis. 
Question: Mutations that lead to cancer usually effect genes that aid in what?
Example Output: mitosis.

Example Input: Fact: if graptolites are found in a place then that place used to be covered by water. 
Question: what are found in place to indicate a place used to be covered by water?
Example Output: graptolites.

Example Input: Fact: Solar light enters ecosystems. 
Question: What enters ecosystems?
Example Output:
Solar light.