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

[Q]: The pupil is the name of the black opening in the eye that lets light enter.
[A]: What is the name of the black opening in the eye that lets light enter?


[Q]: Soft of these best describes the way a feather feels.
[A]: Which of these BEST describes the way a feather feels?


[Q]: By color is the most common way to classify stars.
[A]:
What is the most common way to classify stars?