In this task, we ask you to write a question that asks about "event duration", based on a given sentence. The question will likely start with "How long". Your question should be answerable based on the common knowledge of how long certain events usually last. Don't create questions which have explicit mentions of answers in the text. Instead, it has to be implied from what is given. In other words, we want you to use "instinct" or "common sense". Note that the written questions are not required to have a single correct answer.

Q: Sentence: However , by the time Schahzenan's army reaches the city , Scheherazade's plan has worked .

A: How long will Schahzenan's army take to reach the city?
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Q: Sentence: Technologically and sociologically, it was a phenomenal breakthrough: with fire, communities could live year 'round in one cave, in which cooking and even smelting could be pursued.

A: How long did it take to cook meat?
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Q: Sentence: A statue, by James Earle Fraser, was dedicated on May 17, 1923, on the south terrace of the Treasury Building, in Washington.

A:
How long did it take to make the statue?
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