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: During larva stage of its life cycle does a butterfly spend the most time eating plant leaves. Question: During which stage of its life cycle does a butterfly spend the most time eating plant leaves?
Example Output: larva

Example Input: Sentence: Ores rock contains concentrations of valuable minerals. Question: What type of rock contains concentrations of valuable minerals?
Example Output: ores

Example Input: Sentence: The nucleus is comprised primarily of empty space. Question: The nucleus is comprised primarily of?
Example Output:
empty space