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: Fossil fuels can be formed by layers of sediment pushing down on decomposing algae. 
Question: What is a product of layers of sediment pushing down on decomposing algae over time?
Example Output: Fossil fuels.

Example Input: Fact: Starfish lack respiratory and excretory systems. 
Question: What is an example of an animal that lacks a respiratory and excretory system?
Example Output: Starfish.

Example Input: Fact: daisies exhibit phototropism. 
Question: what exhibits phototropism?
Example Output:
daisies.