Problem: London:

London's bus network is one of the largest in the world, running 24 hours a day, with about 8,500 buses, more than 700 bus routes and around 19,500 bus stops. In 2013, the network had more than 2 billion commuter trips per annum, more than the Underground. Around £850 million is taken in revenue each year. London has the largest wheelchair accessible network in the world and, from the 3rd quarter of 2007, became more accessible to hearing and visually impaired passengers as audio-visual announcements were introduced. The distinctive red double-decker buses are an internationally recognised trademark of London transport along with black cabs and the Tube.

Typically, what color are London taxi cabs?
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A: black


Problem: The northern group consists of the keskmurre or central dialect that is also the basis for the standard language, the läänemurre or western dialect, roughly corresponding to Läänemaa and Pärnumaa, the saarte murre (islands') dialect of Saaremaa and Hiiumaa and the idamurre or eastern dialect on the northwestern shore of Lake Peipsi.
What is the dialect from Lake Peipsi?
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Answer: the idamurre or eastern dialect


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The density of paper ranges from 250 kg/m3 (16 lb/cu ft) for tissue paper to 1,500 kg/m3 (94 lb/cu ft) for some speciality paper. Printing paper is about 800 kg/m3 (50 lb/cu ft).
What is the range of paper dryness?
A: unanswerable


Context and question: In the English language, the capitalized form of God continues to represent a distinction between monotheistic "God" and "gods" in polytheism. The English word God and its counterparts in other languages are normally used for any and all conceptions and, in spite of significant differences between religions, the term remains an English translation common to all. The same holds for Hebrew El, but in Judaism, God is also given a proper name, the tetragrammaton YHWH, in origin possibly the name of an Edomite or Midianite deity, Yahweh. In many translations of the Bible, when the word LORD is in all capitals, it signifies that the word represents the tetragrammaton.
In Edom what does the capitalized form of God represent?
Answer: unanswerable


Question: The iPod has also been credited with accelerating shifts within the music industry. The iPod's popularization of digital music storage allows users to abandon listening to entire albums and instead be able to choose specific singles which hastened the end of the Album Era in popular music.
Is there an answer to this question: In which industry did the iPod have a major impact?

Answer: music industry


Problem: Separation of powers under the United States Constitution:

Courts check both the executive branch and the legislative branch through judicial review. This concept is not written into the Constitution, but was envisioned by many of the Constitution's Framers (for example, The Federalist Papers mention it). The Supreme Court established a precedent for judicial review in Marbury v. Madison. There were protests by some at this decision, born chiefly of political expediency, but political realities in the particular case paradoxically restrained opposing views from asserting themselves. For this reason, precedent alone established the principle that a court may strike down a law it deems unconstitutional.

Who is responsible for judicial review?
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A:
Courts