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

Example Input: Yeast fermentation causes holes in bread.
Example Output: What causes holes in bread?

Example Input: Spring tides are created when the sun and moon's tides match.
Example Output: Which type of tides are created when the sun and moon's tides match?

Example Input: Four valence electrons can be found in a carbon atom.
Example Output:
How many valence electrons can be found in a carbon atom?