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: melting means changing from a solid into a liquid by increasing temperature. 
Question: what is increased to cause something to change from a solid into a liquid?
Example Output: temperature.

Example Input: Fact: Population size influences the chances of going extinct. 
Question: what influences the chances of going extinct?
Example Output: Population size.

Example Input: Fact: Problems with mold spores in the human body are treated by pulmonologists. 
Question: Problems caused by mold spore in the body are treated by what kind of doctor?
Example Output:
Pulmonologists.