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

Input: Consider Input: Like mitochondria, plastids contain their own dna.

Output: Like mitochondria, plastids contain their own what?


Input: Consider Input: The opening in the front of the eye is called pupil.

Output: What is the opening in the front of the eye called?


Input: Consider Input: Removes unwanted substances does water treatment do to water.
Output: What does water treatment do to water?