Problem: Aircraft carrier:

Another deck structure that can be seen is a ski-jump ramp at the forward end of the flight deck. This was first developed to help launch STOVL aircraft take off at far higher weights than is possible with a vertical or rolling takeoff on flat decks. Originally developed by the Royal Navy, it since has been adopted by many navies for smaller carriers. A ski-jump ramp works by converting some of the forward rolling movement of the aircraft into vertical velocity and is sometimes combined with the aiming of jet thrust partly downwards. This allows heavily loaded and fueled aircraft a few more precious seconds to attain sufficient air velocity and lift to sustain normal flight. Without a ski-jump launching fully loaded and fueled aircraft such as the Harrier would not be possible on a smaller flat deck ship before either stalling out or crashing directly into the sea.

What does a ski-jump ramp convert in order to be a failure?
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A: unanswerable

Problem: The geographical regions in which Iranian languages were spoken were pushed back in several areas by newly neighbouring languages. Arabic spread into some parts of Western Iran (Khuzestan), and Turkic languages spread through much of Central Asia, displacing various Iranian languages such as Sogdian and Bactrian in parts of what is today Turkmenistan, Uzbekistan and Tajikistan. In Eastern Europe, mostly comprising the territory of modern-day Ukraine, southern European Russia, and parts of the Balkans, the core region of the native Scythians, Sarmatians, and Alans had been decisively been taken over as a result of absorption and assimilation (e.g. Slavicisation) by the various Proto-Slavic population of the region, by the 6th century AD. This resulted in the displacement and extinction of the once predominant Scythian languages of the region. Sogdian's close relative Yaghnobi barely survives in a small area of the Zarafshan valley east of Samarkand, and Saka as Ossetic in the Caucasus, which is the sole remnant of the once predominant Scythian languages in Eastern Europe proper and large parts of the North Caucasus. Various small Iranian languages in the Pamirs survive that are derived from Eastern Iranian.
By what century had the area inhabited by Sarmatians been absorbed by pre-Slavic people?
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Answer: 6th century AD

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Many assembled PCBs are static sensitive, and therefore must be placed in antistatic bags during transport. When handling these boards, the user must be grounded (earthed). Improper handling techniques might transmit an accumulated static charge through the board, damaging or destroying components. Even bare boards are sometimes static sensitive. Traces have become so fine that it's quite possible to blow an etch off the board (or change its characteristics) with a static charge. This is especially true on non-traditional PCBs such as MCMs and microwave PCBs.
What's another term for "grounded" in the context of PCBs?
A: earthed

Context and question: In 1836, at a party hosted by Marie d'Agoult, Chopin met the French author George Sand (born [Amantine] Aurore [Lucile] Dupin). Short (under five feet, or 152 cm), dark, big-eyed and a cigar smoker, she initially repelled Chopin, who remarked, "What an unattractive person la Sand is. Is she really a woman?" However, by early 1837 Maria Wodzinska's mother had made it clear to Chopin in correspondence that a marriage with her daughter was unlikely to proceed. It is thought that she was influenced by his poor health and possibly also by rumours about his associations with women such as d'Agoult and Sand. Chopin finally placed the letters from Maria and her mother in a package on which he wrote, in Polish, "My tragedy". Sand, in a letter to Grzymaa of June 1838, admitted strong feelings for the composer and debated whether to abandon a current affair in order to begin a relationship with Chopin; she asked Grzymaa to assess Chopin's relationship with Maria Wodzinska, without realising that the affair, at least from Maria's side, was over.
What is the name of the author Chopin met at a gathering put on by Marie d'Agoult?
Answer: George Sand

Question: Many Muslims criticized the Umayyads for having too many non-Muslim, former Roman administrators in their government. St John of Damascus was also a high administrator in the Umayyad administration. As the Muslims took over cities, they left the peoples political representatives and the Roman tax collectors and the administrators. The taxes to the central government were calculated and negotiated by the peoples political representatives. The Central government got paid for the services it provided and the local government got the money for the services it provided. Many Christian cities also used some of the taxes on maintain their churches and run their own organizations. Later the Umayyads were criticized by some Muslims for not reducing the taxes of the people who converted to Islam. These new converts continues to pay the same taxes that were previously negotiated.
Is there an answer to this question: What tax collectors did the Umayyads often leave in place after they conquered regions?

Answer: Roman

Problem: Gothic architecture:

The characteristic forms that were to define Gothic architecture grew out of Romanesque architecture and developed at several different geographic locations, as the result of different influences and structural requirements. While barrel vaults and groin vaults are typical of Romanesque architecture, ribbed vaults were used in the naves of two Romanesque churches in Caen, Abbey of Saint-Etienne and Abbaye aux Dames in 1120. Another early example is the nave and apse area of the Cathedral of Cefalu in 1131. The ribbed vault over the north transept at Durham Cathedral in England, built from 1128 to 1133, is probably earlier still and was the first time pointed arches were used in a high vault.

What cathedral first made use of pointed arches in high vaults?
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A:
Durham Cathedral in England