Input: What if you could drain all of Earths oceans? What would it look like? You might be really surprised. You see that the surface has two main features. It has continents and ocean basins. Continents are large land areas. These are the areas that are mostly above sea level. Ocean basins extend from the edges of continents. They include the ocean floor and Earths deep ocean trenches. You will also notice the ocean floor is not flat. It too has many Continents are much older than ocean basins. Some rocks on the continents are billions of years old. Ocean basins may only be millions of years old. Because the continents are so old, a lot has happened to them! As we view the land around us, we see landforms. Landforms are physical features on Earths surface. These features change over time, but how? There are actually two types of forces at work.

Does the response "Ocean floor" correctly answer the question "What are two elements of ocean basins?"?

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Output: yes

Input: "What goes up must come down." You have probably heard that statement before. At one time this statement was true, but no longer. Since the 1960s, we have sent many spacecraft into space. Some are still traveling away from Earth. So it is possible to overcome gravity. Do you need a giant rocket to overcome gravity? No, you actually overcome gravity every day. Think about when you climb a set of stairs. When you do, you are overcoming gravity. What if you jump on a trampoline? You are overcoming gravity for a few seconds. Everyone can overcome gravity. You just need to apply a force larger than gravity. Think about that the next time you jump into the air. You are overcoming gravity for a brief second. Enjoy it while it lasts. Eventually, gravity will win the battle.

Does the response "You go from downstairs, to upstairs" correctly answer the question "What happens when you climb a set of stairs?"?

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Output: no

Input: Hotel California My first thought: I was going crazy. Twenty-four hours of silence (vacuum, remember); was I hallucinating noises now? I heard it again. It was a fine bell, reminiscent of ancient stone churches and the towering cathedrals I'd seen in documentaries. And accompanying the bell, I saw a light. Now, there were two things here that made ridiculously small amounts of sense. First, the whole in-a-vacuum why's-there-a-bell thing. Second, I was floating in the dark remnants of my broken ship, and any conceivable light sources were not within view; starlight is a distinctly different color and significantly less bright. These signals were the heralds of my saviors. The first words they said to me meant nothing. I wasn't listening; I didn't care; I was going to live; I was going to keep breathing. Next to those, nothing else mattered. The recycled air tasted sweet in my mouth, and all thoughts that crossed my mind were cheap metaphors about life-giving substances and how breathing was like sex, only better. (I reserved the right to revise this opinion later.) When I was done mentally exclaiming over my impossible rescue, I looked around. The ship, it was odd and old, either so outdated or so heavily modified that I couldn't tell what make it was, and somehow, the crew standing around me fit the same description, a singularly atypical amalgamation of folk. And me, I guess I was one more piece in their puzzle. I was one more scrap to weld onto the rest, one more stranded survivor who was found. I was now one of them.

Does the response "The weather" correctly answer the question "Where did the sound and the light come from?"?

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Output: no

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 "Rocky land" correctly answer the question "What type of terrain is found South of Central Illinois?"?

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- no
- yes
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Output:
no