Given a statement, generate a question such that the answer is contained in that statement.

Example Input: Acid changes the shade of certain paper at different acidity.
Example Output: What does acid change the shade of paper at?

Example Input: All cells have cellular matter inside the plasma membrane.
Example Output: What type of membrane does all cells have cellular matter inside?

Example Input: citric chemicals will turn the color of litmus paper from blue to red
Example Output:
What will turn the color of litmus paper from blue to red?