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

Input: Consider Input: In machines that increase force, such as ramps and doorknobs and nutcrackers, output is greater is the relation between output and input force.

Output: In machines that increase force, such as ramps and doorknobs and nutcrackers, what is the relation between output and input force?


Input: Consider Input: Human facial expressions can communicate emotions.

Output: What can human facial expressions communicate?


Input: Consider Input: A statement that describes what always happens under certain conditions in nature is also known as scientific law.
Output: A statement that describes what always happens under certain conditions in nature is also known as what?