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.

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

A: sexual reproduction
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Q: Sentence: Beta decay occurs when an unstable nucleus emits a beta particle and energy. Question: What occurs when an unstable nucleus emits a beta particle and energy?

A: beta decay
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Q: Sentence: Preventive vaccinations can you prevent diseases such as whooping cough and flu. Question: How can you prevent diseases such as whooping cough and flu?

A:
preventive vaccinations
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