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: Instead of heat, organisms use catalysis to speed up reactions. Question: Instead of heat, organisms use what to speed up reactions?
Example Output: catalysis

Example Input: Sentence: None purpose does the appendix serve in humans today. Question: What purpose does the appendix serve in humans today?
Example Output: none

Example Input: Sentence: Thermosphere is the upper-most atmosphere. Question: What is the upper-most atmosphere known as?
Example Output:
thermosphere