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: Distance over time in a given direction determines velocity. Question: What determines velocity?
Example Output: distance over time in a given direction

Example Input: Sentence: Exotic species are also called invasive species because they threaten other species. Question: Why are exotic species also called invasive species?
Example Output: threaten other species

Example Input: Sentence: Changing the shape of an elastic material gives it potential energy. Question: Changing the shape of an elastic material gives it what type of energy?
Example Output:
potential