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

Ex Input:
respiration is aided by open doors

Ex Output:
What helps respiration?


Ex Input:
Some animals that eat grass have more than one stomach.

Ex Output:
How many stomachs do some animals that eat grass have?


Ex Input:
HCl changes the hue of litmus paper from blue to red.

Ex Output:

What color does HCl change in litmus paper?