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: Group 15 of the periodic table is also called nitrogen group. Question: Group 15 of the periodic table is also called which group?
Example Output: nitrogen

Example Input: Sentence: Theevolution by natural selection theory explains how populations of organisms can change over time. Question: Which theory explains how populations of organisms can change over time?
Example Output: evolution by natural selection

Example Input: Sentence: The sun is the largest body in the solar system. Question: What is the largest body in the solar system?
Example Output:
sun