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: Along stream beds are liverworts most often found. Question: Where are liverworts most often found?

Answer: along stream beds

Question: Sentence: Trees need the vascular to transport nutrients. Question: What system do trees need to transport nutrients?

Answer: vascular

Question: Sentence: Removes unwanted substances does water treatment do to water. Question: What does water treatment do to water?

Answer:
removes unwanted substances