Input: 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.
"Why did the prehistoric lake disappear from the Las Vegas Valley?" is "Because glaciers feeding the lake melted away"?

OPTIONS:
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Output: yes

Input: Imagine you are standing in a farm field in central Illinois. The land is so flat you can see for miles and miles. On a clear day, you might see a grain silo 20 miles away. You might think to yourself, it sure is flat around here. If you drive one hundred miles to the south, the landscape changes. In southern Illinois, there are rolling hills. Why do you think this is? What could have caused these features? There are no big rivers that may have eroded and deposited this material. The ground is capable of supporting grass and trees, so wind erosion would not explain it. To answer the question, you need to go back 12,000 years. Around 12,000 years ago, a giant ice sheet covered much of the Midwest United States. Springfield, Illinois, was covered by over a mile of ice. Its hard to imagine a mile thick sheet of ice. The massive ice sheet, called a glacier, caused the features on the land you see today. Where did glaciers go? Where can you see them today? Glaciers are masses of flowing ice.

Does the response "The erosion couldn't have been from wind or rivers" correctly answer the question "What couldn't the erosion have been caused by?"?

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***
Output: yes

(CNN) -- A federal court jury in Florida convicted seven people of participating in a global child pornography trafficking enterprise, according to the Department of Justice. Jurors convicted the seven Wednesday of multiple counts of child exploitation, pornography and obstruction of justice. Members of the organization used Internet news groups to swap and share "illegal images and videos depicting prepubescent children, including toddlers, engaged in various sexual and sadistic acts," prosecutors said. An indictment filed in the case detailed interactions between group members as they swapped and commented on images. "My thanks to you and all the others that together make this the greatest group of pedos to ever gather in one place," Freeman wrote in response to one posting, according to the indictment. And a posting from Castleman, cited in the indictment, read, "Thanks to all for the wonderful material that has been posted." An Australian constable who infiltrated the group in August 2006 was among 50 witnesses testifying at trial. He told the jury that the group traded more than 400,000 images and videos of child sexual abuse before being dismantled by law enforcement, according to the Justice Department statement. Each defendant faces a sentence of 20 years to life in prison, fines and the possibility of supervised release for the rest of their lives, authorities said. The seven will be sentenced April 14. During the six-day trial, evidence showed the seven participated in what prosecutors called a "well-organized criminal enterprise whose purpose was to proliferate child sex abuse images to its membership during a two-year period." "This was a wide-scale, high-volume, international trafficking enterprise that used sophisticated computer encryption technology and file-sharing techniques," Matthew Friedrich, acting assistant attorney general, said in the statement. The seven defendants were James Freeman of Santa Rosa Beach, Florida; Gary Lakey of Anderson, Indiana; Marvin Lambert of Indianapolis, Indiana; Neville McGarity of Medina, Texas; Warren Mumpower of Spokane, Washington; Daniel Castleman of Lubbock, Texas; and Ronald White of Burlington, North Carolina, according to the Department of Justice.

Question: "David Castleman of Lubbock, Texas will face what sentence?"

OPTIONS:
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Answer: "20 years to life in prison, fines and the possibility of supervised release for the rest of their lives"

Response: yes

Problem: In short, the United States has to help defeat an ideology, not just a group of people, and we must do so under difficult circumstances. How can the United States and its friends help moderate Muslims combat the extremist ideas? Recommendation: The U.S. government must define what the message is, what it stands for. We should offer an example of moral leadership in the world, committed to treat people humanely, abide by the rule of law, and be generous and caring to our neighbors. America and Muslim friends can agree on respect for human dignity and opportunity. To Muslim parents, terrorists like Bin Laden have nothing to offer their children but visions of violence and death. America and its friends have a crucial advantage-we can offer these parents a vision that might give their children a better future. If we heed the views of thoughtful leaders in the Arab and Muslim world, a moderate consensus can be found. That vision of the future should stress life over death: individual educational and economic opportunity. This vision includes widespread political participation and contempt for indiscriminate violence. It includes respect for the rule of law, openness in discussing differences, and tolerance for opposing points of view. Recommendation: Where Muslim governments, even those who are friends, do not respect these principles, the United States must stand for a better future. One of the lessons of the long Cold War was that short-term gains in cooperating with the most repressive and brutal governments were too often outweighed by long-term setbacks for America's stature and interests. American foreign policy is part of the message. America's policy choices have consequences. Right or wrong, it is simply a fact that American policy regarding the Israeli-Palestinian conflict and American actions in Iraq are dominant staples of popular commentary across the Arab and Muslim world. That does not mean U.S. choices have been wrong. It means those choices must be integrated with America's message of opportunity to the Arab and Muslim world.

Question: "Which parents can be offered a vision that might give their children a better future?"

Answer: "Arab parents"

OPTIONS:
- no
- yes
Answer:
no