Problem: Guam:

Despite Magellan's visit, Guam was not officially claimed by Spain until January 26, 1565 by General Miguel López de Legazpi.:46 From 1565 to 1815, Guam and the Northern Mariana Islands, the only Spanish outpost in the Pacific Ocean east of the Philippines, was an important resting stop for the Manila galleons, a fleet that covered the Pacific trade route between Acapulco and Manila.:51 To protect these Pacific fleets, Spain built several defensive structures which are still standing today, such as Fort Nuestra Señora de la Soledad in Umatac. It is the biggest single segment of Micronesia, the largest islands between the island of Kyushu (Japan), New Guinea, the Philippines, and the Hawaiian Islands.

In what country is Acapulco?
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A: unanswerable


Problem: For example, one might refer to the A above middle C as a', A4, or 440 Hz. In standard Western equal temperament, the notion of pitch is insensitive to "spelling": the description "G4 double sharp" refers to the same pitch as A4; in other temperaments, these may be distinct pitches. Human perception of musical intervals is approximately logarithmic with respect to fundamental frequency: the perceived interval between the pitches "A220" and "A440" is the same as the perceived interval between the pitches A440 and A880. Motivated by this logarithmic perception, music theorists sometimes represent pitches using a numerical scale based on the logarithm of fundamental frequency. For example, one can adopt the widely used MIDI standard to map fundamental frequency, f, to a real number, p, as follows
The description "G4 double sharp" refers to the same pitch as what?
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Answer: A4


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The TCM Vault Collection consists of several different DVD collections of rare classic films that have been licensed, remastered and released by Turner Classic Movies (through corporate sister Warner Home Video). These boxed set releases are of films by notable actors, directors or studios that were previously unreleased on DVD or VHS. The sets often include bonus discs including documentaries and shorts from the TCM library. The initial batch of DVDs are printed in limited quantities and subsequent batches are made-on-demand (MOD).
After the initial batch of TCM Vault Collection DVDs are printed, how are they made afterwards?
A: on-demand


Context and question: Although the majority of journeys involving central London are made by public transport, car travel is common in the suburbs. The inner ring road (around the city centre), the North and South Circular roads (in the suburbs), and the outer orbital motorway (the M25, outside the built-up area) encircle the city and are intersected by a number of busy radial routes—but very few motorways penetrate into inner London. A plan for a comprehensive network of motorways throughout the city (the Ringways Plan) was prepared in the 1960s but was mostly cancelled in the early 1970s. The M25 is the longest ring-road motorway in the world at 121.5 mi (195.5 km) long. The A1 and M1 connect London to Leeds, and Newcastle and Edinburgh.
Automobile transportation is primarily used in what areas of London?
Answer: the suburbs


Question: Much of mandolin development revolved around the soundboard (the top). Pre-mandolin instruments were quiet instruments, strung with as many as six courses of gut strings, and were plucked with the fingers or with a quill. However, modern instruments are louder—using four courses of metal strings, which exert more pressure than the gut strings. The modern soundboard is designed to withstand the pressure of metal strings that would break earlier instruments. The soundboard comes in many shapes—but generally round or teardrop-shaped, sometimes with scrolls or other projections. There is usually one or more sound holes in the soundboard, either round, oval, or shaped like a calligraphic F (f-hole). A round or oval sound hole may be covered or bordered with decorative rosettes or purfling.
Is there an answer to this question: How many courses of metal strings were pre-mandolin instruments strung with?

Answer: unanswerable


Due to many centuries of intensive settlement, most of the area is shaped by human influence. The original natural vegetation of Thuringia is forest with beech as its predominant species, as can still be found in the Hainich mountains today. In the uplands, a mixture of beech and spruce would be natural. However, most of the plains have been cleared and are in intensive agricultural use while most of the forests are planted with spruce and pine. Since 1990, Thuringia's forests have been managed aiming for a more natural and tough vegetation more resilient to climate change as well as diseases and vermin. In comparison to the forest, agriculture is still quite conventional and dominated by large structures and monocultures. Problems here are caused especially by increasingly prolonged dry periods during the summer months.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Where do most landscape problems come from?
Ah, so..
increasingly prolonged dry periods during the summer months