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: Birds have high levels of intelligence and are wired to learn. 
Question: What have high levels of intelligence and are wired to learn?

Output: birds.


Input: Consider Input: Fact: extreme heat and pressure create slate. 
Question: What do extreme heat and pressure create?

Output: slate.


Input: Consider Input: Fact: The mass of a planet causes the pulling force that holds objects to its surface. 
Question: The mass of a planet causes the pulling force that does what?


Output: holds objects to its surface.