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.

Input: Consider Input: Sentence: 10 million years long can a large star be on the main sequence stage. Question: How long can a large star be on the main sequence stage?

Output: 10 million years

Input: Consider Input: Sentence: Different media affect the speed of light. Question: Different media affect what property of light?

Output: speed

Input: Consider Input: Sentence: Optics explains the behavior of visible light and electromagnetic waves. Question: What type of physics explains the behavior of visible light and electromagnetic waves?
Output: optics