instruction:
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.
question:
Sentence: Leaves changing color on trees of these is the best sign that the fall season has begun. Question: Which of these is the BEST sign that the fall season has begun?
answer:
Leaves changing color on trees


question:
Sentence: No reaction happens when alkanes are mixed with oxygen at room temperature. Question: What happens when alkanes are mixed with oxygen at room temperature?
answer:
no reaction


question:
Sentence: Electromagnetic waves are created by oscillating charges. Question: What are  electromagnetic waves created by?
answer:

oscillating charges