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: Stationary front weather phenomenon, which may bring clouds and precipitation, is created by stalled air masses. Question: What weather phenomenon, which may bring clouds and precipitation, is created by stalled air masses?
Example Output: stationary front

Example Input: Sentence: The refrigerator door contains iron of the following statements best explains why magnets usually stick to a refrigerator door. Question: Which of the following statements best explains why magnets usually stick to a refrigerator door?
Example Output: The refrigerator door contains iron.

Example Input: Sentence: Because the current is alternating, the magnetic field of the iron core keeps doing reversing. Question: Because the current is alternating, the magnetic field of the iron core keeps doing what?
Example Output:
reversing