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

Input: Consider Input: Activities that can reduce the effects of edema condition include exercises to keep the blood and lymph flowing through affected areas.

Output: Activities that can reduce the effects of what condition include exercises to keep the blood and lymph flowing through affected areas?


Input: Consider Input: Atoms of metals are good conductors of electricity because they give up electrons.

Output: Why are atoms of metals good conductors of electricity?


Input: Consider Input: Frequency of a electromagnetic wave can be calculated using the wave equation due to their speed always being constant.


Output: What of a electromagnetic wave can be calculated using the wave equation due to their speed always being constant?