Problem: Asphalt:

Selenizza is mainly used as an additive in the road construction sector. It is mixed with traditional bitumen to improve both the viscoelastic properties and the resistance to ageing. It may be blended with the hot bitumen in tanks, but its granular form allows it to be fed in the mixer or in the recycling ring of normal asphalt plants. Other typical applications include the production of mastic asphalts for sidewalks, bridges, car-parks and urban roads as well as drilling fluid additives for the oil and gas industry. Selenizza is available in powder or in granular material of various particle sizes and is packaged in big bags or in thermal fusible polyethylene bags.

To what other paving material is Selenizza added?
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A: mastic asphalts


Problem: The city grew as the population did, coming up against the lake's waters. As the depth of the lake water fluctuated, Mexico City was subject to periodic flooding. A major labor draft, the desagüe, compelled thousands of Indians over the colonial period to work on infrastructure to prevent flooding. Floods were not only an inconvenience but also a health hazard, since during flood periods human waste polluted the city's streets. By draining the area, the mosquito population dropped as did the frequency of the diseases they spread. However, draining the wetlands also changed the habitat for fish and birds and the areas accessible for Indian cultivation close to the capital.
What was a negative of regulating the lake's water height?
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Answer: changed the habitat for fish and birds


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Apart from being an ardent gamer Spielberg has had a long history of involvement in video games. He has been giving thanks to his games of his division DreamWorks Interactive most notable as Someone's in the Kitchen with script written by Animaniacs' Paul Rugg, Goosebumps: Escape from HorrorLand, The Neverhood (all in 1996), Skullmonkeys, Dilbert's Desktop Games, Goosebumps: Attack of the Mutant (all 1997), Boombots (1999), T'ai Fu: Wrath of the Tiger (1999), and Clive Barker's Undying (2001). In 2005 the director signed with Electronic Arts to collaborate on three games including an action game and an award winning puzzle game for the Wii called Boom Blox (and its 2009 sequel: Boom Blox Bash Party). Previously, he was involved in creating the scenario for the adventure game The Dig. In 1996, Spielberg worked on and shot original footage for a movie-making simulation game called Steven Spielberg's Director's Chair. He is the creator of the Medal of Honor series by Electronic Arts. He is credited in the special thanks section of the 1998 video game Trespasser. In 2013, Spielberg has announced he is collaborating with 343 Industries for a live-action TV show of Halo.
In what year did The Dig get released?
A: unanswerable


Context and question: It has been proved that each class is strictly included into the next. For instance, testing when we assume that the behavior of the implementation under test can be denoted by a deterministic finite-state machine for some known finite sets of inputs and outputs and with some known number of states belongs to Class I (and all subsequent classes). However, if the number of states is not known, then it only belongs to all classes from Class II on. If the implementation under test must be a deterministic finite-state machine failing the specification for a single trace (and its continuations), and its number of states is unknown, then it only belongs to classes from Class III on. Testing temporal machines where transitions are triggered if inputs are produced within some real-bounded interval only belongs to classes from Class IV on, whereas testing many non-deterministic systems only belongs to Class V (but not all, and some even belong to Class I). The inclusion into Class I does not require the simplicity of the assumed computation model, as some testing cases involving implementations written in any programming language, and testing implementations defined as machines depending on continuous magnitudes, have been proved to be in Class I. Other elaborated cases, such as the testing framework by Matthew Hennessy under must semantics, and temporal machines with rational timeouts, belong to Class II.
It has been disproved that each class is included into what?
Answer: unanswerable


Question: The Church of the Holy Apostles in Thessaloniki was built in 1310–14. Although some vandal systematically removed the gold tesserae of the background it can be seen that the Pantokrator and the prophets in the dome follow the traditional Byzantine pattern. Many details are similar to the Pammakaristos mosaics so it is supposed that the same team of mosaicists worked in both buildings. Another building with a related mosaic decoration is the Theotokos Paregoritissa Church in Arta. The church was established by the Despot of Epirus in 1294–96. In the dome is the traditional stern Pantokrator, with prophets and cherubim below.
Is there an answer to this question: The same team of mosaicists worked on the Church of the Holy Apostles in Thessaloniki as which other building?

Answer: Pammakaristos


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
This changed with the recent sovereign-debt crisis. The ECB always could, and through the late summer of 2011 did, purchase bonds issued by the weaker states even though it assumes, in doing so, the risk of a deteriorating balance sheet. ECB buying focused primarily on Spanish and Italian debt. Certain techniques can minimise the impact. Purchases of Italian bonds by the central bank, for example, were intended to dampen international speculation and strengthen portfolios in the private sector and also the central bank.
What was something used to maximize the impact of the soverign-debt crisis?
A:
unanswerable