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

[EX Q]: 2 hydrogen, 1 oxygen atoms combine to make up a molecule of water.
[EX A]: What atoms combine to make up a molecule of water?

[EX Q]: Poles parts of the planet does solar energy have difficulty reaching.
[EX A]: What parts of the planet does solar energy have difficulty reaching?

[EX Q]: Golden eagles living species of bird is considered the  largest of the raptors.
[EX A]:
What living species of bird is considered the  largest of the raptors?