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

[EX Q]: Healthy lungs is necessary in a person who wishes to play wind instruments.
[EX A]: What is necessary in a person who wishes to play wind instruments?

[EX Q]: Together, the muscular and skeletal organs are known as the musculoskeletal system.
[EX A]: Together, the muscular and skeletal organs are known as what?

[EX Q]: You call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars, elliptical galaxies.
[EX A]:
What do you call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars?