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: Oxygen has increased in the atmosphere throughout the history of the earth. Question: What has increased in the atmosphere throughout the history of the earth?
Example Output: oxygen

Example Input: Sentence: Venus is the only planet that rotates clockwise as viewed from its north pole. Question: What is the only planet that rotates clockwise as viewed from its north pole?
Example Output: venus

Example Input: Sentence: Mesoderm type of cell layer do flatworms have. Question: What type of cell layer do flatworms have?
Example Output:
mesoderm

