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: Respiratory acidosis is considered to be problematic because excess co2 in blood.

Output: Why is respiratory acidosis considered to be problematic?

Input: Consider Input: A 50 ml graduated cylinder of the following tools would give the most precise measurement of 15 milliliters of water.
Output: Which of the following tools would give the most precise measurement of 15 milliliters of water?