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: Condoms make sex safe if they're not used incorrectly. 
Question: When aren't condoms safe?
Example Output: When they're used incorrectly.

Example Input: Fact: heating a pan on a stove generates carcinogens. 
Question: heating a pan on a stove generates?
Example Output: carcinogens.

Example Input: Fact: Many nucleotides bind together to form a chain that because of asymmetry of sugar has inherent polarity. 
Question: What does the asymmetry of sugar have inherent polarity on?
Example Output:
nucleotides.