Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: Landslides moving loose rocks downhill process is the best example of a sudden change to earth’s surface.

Output: Which process is the best example of a sudden change to Earth’s surface?


Input: Consider Input: Based on the passage, they may represent individual people is one conclusion archaeologists have reached about the statues.

Output: Based on the passage, what is one conclusion archaeologists have reached about the statues?


Input: Consider Input: Varicose veins are veins that become enlarged because the valves no longer close properly.


Output: Varicose veins are veins that become enlarged because the valves no longer do this?