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.

Input: Consider Input: Fact: pines have a positive impact on an ecosystem. 
Question: what has a positive impact on an ecosystem?

Output: pines.


Input: Consider Input: Fact: food is irradiated for space travel. 
Question: what food is required for space travel?

Output: irradiated.


Input: Consider Input: Fact: Macroevolution above the level of the species is evolution over eras and periods. 
Question: Macroevolution above the level of the species happens over what?


Output: eras.