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

Ex Input:
You call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars, elliptical galaxies.

Ex Output:
What do you call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars?


Ex Input:
Air quality is a measure of pollutants in the air.

Ex Output:
Air quality is a measure of what in the air?


Ex Input:
When light reflects from a rough surface, it gets diffused.

Ex Output:
What happens to light when it reflects from a rough surface?