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: Sexual reproduction usually occur during times of environmental stress. Question: What type of reproduction usually occur during times of environmental stress?

Answer: sexual reproduction


Question: Sentence: Air weakly scatters visible light. Question: What weakly scatters visible light?

Answer: air


Question: Sentence: Four children born at one birth are called quadruplets. Question: What are four children born at one birth called?

Answer:
quadruplets