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.
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Question: Sentence: During phase change, the temperature of a system remains constant. Question: What happens to the temperature of a system during phase change?

Answer: remains constant

Question: Sentence: Is sleep an active or inactive state in the brain? Question: Is sleep an active or inactive state in the brain?

Answer: active

Question: Sentence: One many directions can ions flow along the axon. Question: How many directions can ions flow along the axon?

Answer:
one