Problem: Zhejiang:

Ningbo, Wenzhou, Taizhou and Zhoushan are important commercial ports. The Hangzhou Bay Bridge between Haiyan County and Cixi, is the longest bridge over a continuous body of sea water in the world.

 What bridge does not go to Cixi?
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A: unanswerable


Problem: The Sichuanese are proud of their cuisine, known as one of the Four Great Traditions of Chinese cuisine. The cuisine here is of "one dish, one shape, hundreds of dishes, hundreds of tastes", as the saying goes, to describe its acclaimed diversity. The most prominent traits of Sichuanese cuisine are described by four words: spicy, hot, fresh and fragrant. Sichuan cuisine is popular in the whole nation of China, so are Sichuan chefs. Two well-known Sichuan chefs are Chen Kenmin and his son Chen Kenichi, who was Iron Chef Chinese on the Japanese television series "Iron Chef".
What is popular in the whole nation of Japan?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Modern archaeology has largely discarded the historicity of the Patriarchs and of the Exodus story, with it being reframed as constituting the Israelites' inspiring national myth narrative. The Israelites and their culture, according to the modern archaeological account, did not overtake the region by force, but instead branched out of the Canaanite peoples and culture through the development of a distinct monolatristic — and later monotheistic — religion centered on Yahweh, one of the Ancient Canaanite deities. The growth of Yahweh-centric belief, along with a number of cultic practices, gradually gave rise to a distinct Israelite ethnic group, setting them apart from other Canaanites. The Canaanites themselves are archeologically attested in the Middle Bronze Age, while the Hebrew language is the last extant member of the Canaanite languages. In the Iron Age I period (1200–1000 BCE) Israelite culture was largely Canaanite in nature.
The period of time from 1200 to 1000 BCE is known as what?
A: Iron Age


Context and question: The most common symptom of LED (and diode laser) failure is the gradual lowering of light output and loss of efficiency. Sudden failures, although rare, can also occur. Early red LEDs were notable for their short service life. With the development of high-power LEDs the devices are subjected to higher junction temperatures and higher current densities than traditional devices. This causes stress on the material and may cause early light-output degradation. To quantitatively classify useful lifetime in a standardized manner it has been suggested to use L70 or L50, which are the runtimes (typically given in thousands of hours) at which a given LED reaches 70% and 50% of initial light output, respectively.
What is rare in LED lighting?
Answer: Sudden failures


Question: The essential usefulness of a transistor comes from its ability to use a small signal applied between one pair of its terminals to control a much larger signal at another pair of terminals. This property is called gain. It can produce a stronger output signal, a voltage or current, which is proportional to a weaker input signal; that is, it can act as an amplifier. Alternatively, the transistor can be used to turn current on or off in a circuit as an electrically controlled switch, where the amount of current is determined by other circuit elements.
Is there an answer to this question: What determines the amount of current in an electrically controlled switch?

Answer: other circuit elements


Problem: 51st state:

Several websites assert that Israel is the 51st state due to the annual funding and defense support it receives from the United States. An example of this concept can be found in 2003 when Martine Rothblatt published a book called Two Stars for Peace that argued for the addition of Israel and the Palestinian territories surrounding it as the 51st state in the Union. The American State of Canaan, is a book published by Prof. Alfred de Grazia, political science and sociologist, in March 2009, proposing the creation of the 51st and 52nd states from Israel and the Palestinian territories.

Who wrote the book Martine Rothblatt? 
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A:
unanswerable