Problem: Hellenistic period:

There has been a trend in writing the history of this period to depict Hellenistic art as a decadent style, following of the Golden Age of Classical Athens. Pliny the Elder, after having described the sculpture of the classical period says: Cessavit deinde ars ("then art disappeared"). The 18th century terms Baroque and Rococo have sometimes been applied, to the art of this complex and individual period. The renewal of the historiographical approach as well as some recent discoveries, such as the tombs of Vergina, allow a better appreciation of this period's artistic richness.

Who said "then art dissapeared"?
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A: Pliny the Elder


Problem: Muhammad also ordered another siege on the Banu Qurayza during the Invasion of Banu Qurayza, because according to Muslim tradition he had been ordered to do so by the angel Gabriel. Al-Waqidi claims Muhammad had a treaty with the tribe which was torn apart. Stillman and Watt deny the authenticity of al-Waqidi. Al-Waqidi has been frequently criticized by Muslim writers, who claim that he is unreliable. 600-900 members of the Banu Qurayza were beheaded after they surrendered (according to Tabari and Ibn Hisham). Another source says all Males and 1 woman beheaded (according to Sunni Hadith). Two Muslims were killed
How many members of the Banu Qurayza were beheaded after surrendering to Muhammad and his followers according to Tabari and Ibn Hisham?
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Answer: 600-900


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Physically, clothing serves many purposes: it can serve as protection from the elements, and can enhance safety during hazardous activities such as hiking and cooking. It protects the wearer from rough surfaces, rash-causing plants, insect bites, splinters, thorns and prickles by providing a barrier between the skin and the environment. Clothes can insulate against cold or hot conditions. Further, they can provide a hygienic barrier, keeping infectious and toxic materials away from the body. Clothing also provides protection from harmful UV radiation.
What can protect you from smooth surfaces
A: unanswerable


Context and question: In the classical case, the invariance, or symmetry, group and the covariance group coincide, but, interestingly enough, they part ways in relativistic physics. The symmetry group of the general theory of relativity includes all differentiable transformations, i.e., all properties of an object are dynamical, in other words there are no absolute objects. The formulations of the general theory of relativity, unlike those of classical mechanics, do not share a standard, i.e., there is no single formulation paired with transformations. As such the covariance group of the general theory of relativity is just the covariance group of every theory.
 The covariance group of the general theory of relativity is the covariance group of how many theories?
Answer: every


Question: Although many species can reproduce asexually and use similar mechanisms to regenerate after severe injuries, sexual reproduction is the normal method in species whose reproduction has been studied. The minority of living polychaetes whose reproduction and lifecycles are known produce trochophore larvae, that live as plankton and then sink and metamorphose into miniature adults. Oligochaetes are full hermaphrodites and produce a ring-like cocoon around their bodies, in which the eggs and hatchlings are nourished until they are ready to emerge.
Is there an answer to this question: What annelids make a cocoon in a pyramid around themselves?

Answer: unanswerable


In infrared photography, infrared filters are used to capture the near-infrared spectrum. Digital cameras often use infrared blockers. Cheaper digital cameras and camera phones have less effective filters and can "see" intense near-infrared, appearing as a bright purple-white color. This is especially pronounced when taking pictures of subjects near IR-bright areas (such as near a lamp), where the resulting infrared interference can wash out the image. There is also a technique called 'T-ray' imaging, which is imaging using far-infrared or terahertz radiation. Lack of bright sources can make terahertz photography more challenging than most other infrared imaging techniques. Recently T-ray imaging has been of considerable interest due to a number of new developments such as terahertz time-domain spectroscopy.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What devices are often equipped with infrared blockers?
Ah, so..
Digital cameras