In this task, you will be presented with a context passage, a question about that paragraph, and a possible answer to that question. The task is to check the validity of the answer. Answer with "Yes" or "No".

[EX Q]: 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. <sep>What couldn't the erosion have been caused by?<sep>Wind
[EX A]: Yes

[EX Q]: From a human point of view, a habitat is where you live. It might be your city, town, or neighborhood. Your habitat can be altered. Most people move a few times in their lives. But a plant cannot move. An animal may not be suited to live in another area. A habitat is the natural home or environment of an organism. Humans often destroy the habitats of other organisms. The loss of habitat can cause the extinction of species. Extinction is when a species disappears forever. Once a species is extinct, it can never be brought back. Humans cause habitat destruction in many ways. There are two common ways this happens. Land may be cleared. Another way is when an animal or plant is brought to an area where it does not belong. <sep>Once a species is extinct, can it be brought back?<sep>no, it is gone forever.
[EX A]: Yes

[EX Q]: Sam Farragut is a sociopathic business executive in Southern California who forces a team of advertising agency employees to embark on a dangerous dirtbike trip to the Baja California desert in order to compete for his business .  The men are Warren Summerfield , a suicidal middle-aged ad executive who has been fired from the agency ; the straightlaced Paul McIlvain who is inattentive to his wife , and brash art designer Maxon who feels suddenly trapped after his girlfriend announces she is pregnant .  There are numerous long sequences of motorcycle riding on desert backroads .  Summerfield has been having an affair with McIlvian's wife .  He has not told his wife that he was fired and is simply serving out his tenure at the agency while looking for a new position .  His wife is actually aware of the affair .  Farragut convinces the ad men to make the motorcycle journey on the pretext of looking for a location to shoot a commercial .  In reality , Farragut is reckless and looking to involve the men in spontaneous edgy adventure of his own manipulation .  After they leave , McIlvain's wife suspects that Summerfield is planning to kill himself for the insurance money , but she can not convince Summerfield's wife to instigate a search .  The four men travel deeper into Mexico on isolated dirt roads .  At one point Summerfield contemplates plunging off a cliff .  After being humiliated by a young American couple in a Baja bar , Farragut tracks them down on the beach while accompanied by Maxon . <sep>Who has been having an affair with McIlvain's wife, a situation his own wife is aware of?<sep>McIlvian's wife
[EX A]:
No

