Answer:
What is between heaven and earth?
What is something you will never see again?
What never gets any wetter no matter how hard it rains?
They come to witness the night without being called, a sailor's guide and a poet's tears. They are lost to the sight each day without the hand of a thief.
These are needed to finish a test
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.