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: There are four classes of biochemical compounds. Question: How many classes of biochemical compounds are there?

Answer: four


Question: Sentence: Substances enter any plant or animal cell by passing through cell membrane of the following structures. Question: Substances enter any plant or animal cell by passing through which of the following structures?

Answer: cell membrane


Question: Sentence: Muscles need stimulus to contract. Question: What do muscles need to contract?

Answer:
stimulus


