Input: Read this: Sumerian cities during the Uruk period were probably theocratic and were most likely headed by a priest-king (ensi), assisted by a council of elders, including both men and women. It is quite possible that the later Sumerian pantheon was modeled upon this political structure. There was little evidence of organized warfare or professional soldiers during the Uruk period, and towns were generally unwalled. During this period Uruk became the most urbanized city in the world, surpassing for the first time 50,000 inhabitants.
Question: During what period did Sumeria develop professional soldiers?

Output: unanswerable

QUES: Deciduous trees and plants have been promoted as a means of controlling solar heating and cooling. When planted on the southern side of a building in the northern hemisphere or the northern side in the southern hemisphere, their leaves provide shade during the summer, while the bare limbs allow light to pass during the winter. Since bare, leafless trees shade 1/3 to 1/2 of incident solar radiation, there is a balance between the benefits of summer shading and the corresponding loss of winter heating. In climates with significant heating loads, deciduous trees should not be planted on the Equator facing side of a building because they will interfere with winter solar availability. They can, however, be used on the east and west sides to provide a degree of summer shading without appreciably affecting winter solar gain.

What side of a building should trees be planted without greatly affecting solar gain in the winter?
What is the answer?
ANS: east and west

QUES: Since June 2009 VidZone has offered a free music video streaming service in Europe, Australia and New Zealand. In October 2009, Sony Computer Entertainment and Netflix announced that the Netflix streaming service would also be available on PlayStation 3 in the United States. A paid Netflix subscription was required for the service. The service became available in November 2009. Initially users had to use a free Blu-ray disc to access the service; however, in October 2010 the requirement to use a disc to gain access was removed.
In October 2010, the requirement to use what was installed?

ANS: unanswerable

Richmond has a significant arts community, some of which is contained in formal public-supported venues, and some of which is more DIY, such as local privately owned galleries, and private music venues, nonprofit arts organizations, or organic and venueless arts movements (e.g., house shows, busking, itinerant folk shows). This has led to tensions, as the city Richmond City levied an "admissions tax" to fund large arts projects like CentreStage, leading to criticism that it is funding civic initiatives on the backs of the organic local culture. Traditional Virginian folk music, including blues, country, and bluegrass are also notably present, and play a large part in the annual Richmond Folk Festival. The following is a list of the more formal arts establishments (Companies, theaters, galleries, and other large venues) in Richmond:
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What notable project was funded by Richmond's "admissions tax"?
Ah, so.. CentreStage

Question: Recent developments in LEDs permit them to be used in environmental and task lighting. LEDs have many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. Light-emitting diodes are now used in applications as diverse as aviation lighting, automotive headlamps, advertising, general lighting, traffic signals, camera flashes and lighted wallpaper. As of 2015[update], LEDs powerful enough for room lighting remain somewhat more expensive, and require more precise current and heat management, than compact fluorescent lamp sources of comparable output.
Try to answer this question if possible: What is an advantage to using non-LED lighting over the normal light sources?
Answer: unanswerable

Input: Read this: The Somali language is a member of the Cushitic branch of the Afro-Asiatic family. Its nearest relatives are the Afar and Saho languages. Somali is the best documented of the Cushitic languages, with academic studies of it dating from before 1900.
Question: Along with Saho, what language is closely related to Somali?

Output:
Afar