Answer:
I am an English word that is as long as I am valued. What am I?
What is the edge of earth and bread?
What room do ghosts avoid?
Who is your mother's only sister's son's brother's aunt's daughter's sister's father?
I go through a door but never go in and never come out.
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.