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: Property to time kind of variation does a rate measure. Question: What kind of variation does a rate measure?
Example Output: property to time

Example Input: Sentence: Oxygen has increased in the atmosphere throughout the history of the earth. Question: What has increased in the atmosphere throughout the history of the earth?
Example Output: oxygen

Example Input: Sentence: Generators usually transform kinetic energy into electrical energy kind of energy. Question: Generators usually transform kinetic energy into what kind of energy?
Example Output:
electrical energy