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: Combustion reaction occurs when a substance reacts quickly with oxygen. Question: What occurs when a substance reacts quickly with oxygen?
Example Output: combustion reaction

Example Input: Sentence: Nonmetals have the highest attraction for electrons. Question: What elements have the highest attraction for electrons?
Example Output: nonmetals

Example Input: Sentence: All members of a species living together form a(n) population. Question: All members of a species living together form a what?
Example Output:
population