(Question)
This is a correct answer to the following question about Postage stamp. Yes or no? Answer: The first adhesive postage stamp, commonly referred to as the Penny Black , was issued in the United Kingdom in 1840. Question: when were forever stamps introduced
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No

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This is a correct answer to the following question about Second-language acquisition. Yes or no? Answer: There has been much debate about exactly how language is learned, and many issues are still unresolved. Question: What is the third theory of language acquisition.
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No

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This is a correct answer to the following question about Infrastructure. Yes or no? Answer: It is an important term for judging a country or region's development. Question: what is Non-profit infrastructure
(Answer)
No