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

Input: Consider Input: If a substance has a ph value greater than 7,that indicates that it is base.

Output: If a substance has a ph value greater than 7, what does it indicate?

Input: Consider Input: The sun delivers power to the chemical factory chloroplasts.

Output: What delivers power to the chemical factory chloroplasts?

Input: Consider Input: Silver chloride can be used as an antidote for mercury kind of poisoning.
Output: Silver chloride can be used as an antidote for which kind of poisoning?