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.

Fact: Smog is an airborne pollutant. 
Question: What is an airborne pollutant?
Smog.

Fact: An object's shape can be changed by removing material. 
Question: What is one way an object's shape can be changed?
removing material.

Fact: Tungsten filament sealed in a glass bulb is used for seeing in the dark. 
Question: Tungsten filaments sealed in a glass bulb are used for what in the dark?

seeing.