instruction:
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.
question:
Fact: Cells that divide uncontrollably may form masses of neoplastic origin. 
Question: Cells that divide uncontrollably may form _.?
answer:
masses of neoplastic origin.


question:
Fact: ears are used for hearing. 
Question: What are ears used for?
answer:
to hear.


question:
Fact: Mold spores can have negative impact on the sinuses in a body. 
Question: What can have a negative impact on the sinuses in a body?
answer:

mold spores.