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 bow wake is created when the wave source moves faster than the wave propagation speed. Question: What is created when the wave source moves faster than the wave propagation speed?
Example Output: bow wake

Example Input: Sentence: Cranium (skull) is the term for the skeletal structure of the head that supports the face and protects the brain. Question: What is the term for the skeletal structure of the head that supports the face and protects the brain?
Example Output: cranium (skull)

Example Input: Sentence: The life cycle of plants is so complex because of the alternation of generation. Question: Why is the life cycle of plants so complex?
Example Output:
alternation of generation