Problem: Hunter-gatherer:

One way to divide hunter-gatherer groups is by their return systems. James Woodburn uses the categories "immediate return" hunter-gatherers for egalitarian and "delayed return" for nonegalitarian. Immediate return foragers consume their food within a day or two after they procure it. Delayed return foragers store the surplus food (Kelly, 31).

Temporary return foragers consume their food when?
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A: unanswerable


Problem: One of the problems of the standard electric light bulb is filament notching due to evaporation of the filament. Small variations in resistivity along the filament cause "hot spots" to form at points of higher resistivity; a variation of diameter of only 1% will cause a 25% reduction in service life. These hot spots evaporate faster than the rest of the filament, which increases the resistance at that point—this creates a positive feedback that ends in the familiar tiny gap in an otherwise healthy-looking filament. Irving Langmuir found that an inert gas, instead of vacuum, would retard evaporation. General service incandescent light bulbs over about 25 watts in rating are now filled with a mixture of mostly argon and some nitrogen, or sometimes krypton. Lamps operated on direct current develop random stairstep irregularities on the filament surface which may cut lifespan in half compared to AC operation; different alloys of tungsten and rhenium can be used to counteract the effect.
Which gases are typically used in a light bulb?
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Answer: argon and some nitrogen, or sometimes krypton


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The most notable fraud conviction was that of Gordon Foxley, head of defence procurement at the Ministry of Defence from 1981 to 1984. Police claimed he received at least £3.5m in total in corrupt payments, such as substantial bribes from overseas arms contractors aiming to influence the allocation of contracts.
What years was Foxley employed by the MoD?
A: 1981 to 1984


Context and question: In philosophy, idealism is the group of philosophies which assert that reality, or reality as we can know it, is fundamentally mental, mentally constructed, or otherwise immaterial. Epistemologically, idealism manifests as a skepticism about the possibility of knowing any mind-independent thing. In a sociological sense, idealism emphasizes how human ideas—especially beliefs and values—shape society. As an ontological doctrine, idealism goes further, asserting that all entities are composed of mind or spirit. Idealism thus rejects physicalist and dualist theories that fail to ascribe priority to the mind.
What processes do idealists say are constructed by reality?
Answer: unanswerable


Question: The Duke of Wellington is often incorrectly quoted as saying that "The Battle of Waterloo was won on the playing-fields of Eton". Wellington was at Eton from 1781 to 1784 and was to send his sons there. According to Nevill (citing the historian Sir Edward Creasy), what Wellington said, while passing an Eton cricket match many decades later, was, "There grows the stuff that won Waterloo", a remark Nevill construes as a reference to "the manly character induced by games and sport" amongst English youth generally, not a comment about Eton specifically. In 1889, Sir William Fraser conflated this uncorroborated remark with the one attributed to him by Count Charles de Montalembert's "C'est ici qu'a été gagné la bataille de Waterloo" ("It is here that the Battle of Waterloo was won.")
Is there an answer to this question: For what years did Sir William Fraser attend Eton?

Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The nervous system is large relative to the bird's size. The most developed part of the brain is the one that controls the flight-related functions, while the cerebellum coordinates movement and the cerebrum controls behaviour patterns, navigation, mating and nest building. Most birds have a poor sense of smell with notable exceptions including kiwis, New World vultures and tubenoses. The avian visual system is usually highly developed. Water birds have special flexible lenses, allowing accommodation for vision in air and water. Some species also have dual fovea. Birds are tetrachromatic, possessing ultraviolet (UV) sensitive cone cells in the eye as well as green, red and blue ones. This allows them to perceive ultraviolet light, which is involved in courtship. Birds have specialized light-sensing cells deep in their brains that respond to light without input from eyes or other sensory neurons. These photo-receptive cells in the hypothalamus are involved in detecting the longer days of spring, and thus regulate breeding activities.
What regulates breeding activities?
A:
photo-receptive cells in