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.

Input: Consider Input: Sentence: Biodiversity helps ensure that, at least, some species will survive environmental change. Question: What helps ensure that, at least, some species will survive environmental change?

Output: biodiversity


Input: Consider Input: Sentence: When the core of a star begins to run low on hydrogen, it contracts. Question: What happens to the core of a star when it begins to run low on hydrogen?

Output: it contracts


Input: Consider Input: Sentence: Property to time kind of variation does a rate measure. Question: What kind of variation does a rate measure?


Output: property to time