The inhabited history of the Las Vegas Valley stretches to 23,000 b.c. , when much of the area was covered by a prehistoric lake. During this period, the indigenous people lived in caves, hunting the mammals that gathered at the shoreline. The landscape of the valley changed dramatically over the next 200 centuries. The glaciers feeding the lake melted away and the lake evaporated. Fossils tell an obscure story of man's slow and sporadic development. Around 3000 b.c. , native Archaic Indians began to develop a lasting hunting and gathering culture. By this time, the valley was in much the same geographic state as it exists in today, with one exceptionthe presence of artesian springs that bubbled to the surface in several areas. These springs fed a network of streams draining through the Las Vegas Wash to the Colorado River. The areas surrounding the springs were desert oases: sprawling collections of grasses, trees, and wildlife. Many springs lay in areas that would eventually become the center of the modern Las Vegas metropolis. For about 4000 years, the Archaics thrived in a culture that included many signs of early civilization. Signs of even more advancement appeared halfway through the first millennium a.d. , when the Anasazi Indians inhabited the valley. Far more progressive than the Archaics, the Anasazi utilized such formal agricultural techniques as irrigation to assist their harvest. This permitted the Anasazi to achieve a benchmark of advanced societythe ability to live in permanent shelters year-round without need to follow wildlife. Mysteriously, the Anasazi vanished from the valley around a.d.

Question: "During what time period did the Anasazi Indians inhabit the Las Vegas valley?"

Answer: "150 b.c"

Response: no

Washington (CNN) -- The U.S. Food and Drug Administration announced Wednesday that laboratory tests on popular smoking devices known as electronic cigarettes have found they contain carcinogens and other toxic chemicals dangerous to humans. E-cigarettes are battery-operated and contain cartridges filled with nicotine and other chemicals. Known as "e-cigarettes," the devices are battery-operated and contain cartridges filled with nicotine and other chemicals, spiced with flavors such as chocolate, cola or bubble gum. While manufacturers tout e-cigarettes as a "healthy way" to smoke, federal health officials say the devices turn nicotine, which is highly addictive, and other chemicals into a vapor that is inhaled by the user. "The FDA is concerned about the safety of these products and how they are marketed to the public," said Dr. Margaret A. Hamburg, commissioner of the FDA. CNN contacted Florida-based Smoking Everywhere, one of the largest manufacturers of e-cigarettes, after the FDA announcement, and a spokeswoman said the company had no comment. Because e-cigarettes have not been submitted to the FDA for evaluation or approval, the agency had no way of knowing the levels of nicotine or the amounts or kinds of other chemicals that the various brands of these products deliver to the user. That is why the FDA began to test them. The FDA's Division of Pharmaceutical Analysis analyzed the ingredients in a small sample of cartridges from two leading brands of e-cigarettes. In releasing its information, the FDA did not identify the two companies, but said in one sample, diethylene glycol -- a chemical used in antifreeze that is toxic to humans -- was detected. Other samples detected carcinogens that are dangerous to those who smoke them, the FDA said. The FDA has been examining and seizing shipments of non-U.S.-made e-cigarettes at the U.S. border since summer 2008. To date, 50 shipments have been stopped. The products examined thus far meet the definition of a combination drug-device product under the Federal Food, Drug, and Cosmetic Act. "We know very little about these devices, said Dr. Jonathan Samet, director of the Institute for Global Health at the University of Southern California, "but to say they are healthy -- that's highly doubtful."

Question: "Who are two people in the passage that question the safety of e-cigarettes?"

Answer: "They are Dr. Jonathan Samet, director of the Institute for Global Health at the University of Southern California and Dr. Margaret A. Hamburg, commissioner of the FDA"

Response: yes

The opening shot of the movie shows Kunti praying for Lord Krishna's protection for the Pandavas . Lord Krishna consoles Kunti and promises to ever protect the Pandavas and guide them through troubles and problems that may occur in life . The sons of Pandu and Dhritarashtra progeny break into an argument . When Duryodhana insults the Pandavas as '' dependents '' , Bheema counters by saying that , the Kauravas are the progeny of a widow . Duryodhana asks Veda Vyasa for an explanation . He is then told that , since his mother , Gandhari had an astrological defect , she is first married of to a goat and then married to his father . Duryodhana gains animosity towards the kingdom of Gandhara where the king , the father of his mother Gandhari , rules . He attacks Gandhara and lays waste of the whole kingdom . He them imprisons the royal family in his prison . He gives them only one rice grain per prisoner . The king of Gandhara then stops everyone from grabbing the little food that is provided . He says that instead of everyone dying , they could keep at least one of their princes alive . He chooses Sakuni to be alive . Sakuni takes an oath that he will do everything he can to destroy the entire Kaurava clan . He makes magic dice from his father's spinal cord . The magic dice show exactly the number that he would want . Duryodhana takes pity on the lone prisoner , Sakuni after the rest of the Gandhara royal family dies in prison out of starvation . Sakuni joins the evil of coterie of Duryodhana , Karna and Dushyasana .

Question: "Who lays waste to the kingdom, and what does he do after?"

Answer: "Duryodhana"

Response: yes

Rivers flowing over gentle slopes move more slowly. They move much more slowly than a mountain stream. These slow moving streams create different types of features than mountain streams. Slow moving water erodes the sides of their channels more than the bottom. Also, large curves in the stream form. These curves are called meanders. Meanders are caused by erosion and deposition. Remember, faster moving water causes erosion more quickly. Slower moving water erodes material more slowly. If water is moving slowly enough, the sediment being carried may settle out. This settling out, or dropping off, of sediment is deposition. The curves are called meanders because they slowly wander over the land. As meanders erode from side to side, they create a floodplain. This is a broad, flat area on both sides of a river. Eventually, a meander may become cut off from the rest of the river. This forms an oxbow lake.

Question: "What type of stream can create deposition?"

Answer: "Fast moving streams"

Response:
no