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

Input: Consider Input: While the numerical aperture can be used to compare resolutions of various objectives, it does not indicate how far the lens could be from the specimen.

Output: While the numerical aperture can be used to compare resolutions of various objectives, it does not indicate how far the lens could be from the what?

Input: Consider Input: In paragraph 2, they had been untouched for centuries does the phrase frozen in time suggest about the figures.

Output: In paragraph 2, what does the phrase frozen in time suggest about the figures?

Input: Consider Input: All enzymes have an optimal temperature and ph.
Output: All enzymes have an optimal temperature and what?