In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Example Input: Sentence: A reptile's metabolism doesn't generate enough energy to keep their body temperature stable. Question: A reptile's what doesn't generate enough energy to keep their body temperature stable?
Example Output: metabolism

Example Input: Sentence: Carry out functions will the contraction of smooth muscles help organs do. Question: What will the contraction of smooth muscles help organs do?
Example Output: carry out functions

Example Input: Sentence: More predators factor would most likely limit the number of mice living in an area. Question: Which factor would most likely limit the number of mice living in an area?
Example Output:
more predators