Stage setting that William Gibson suggests for his play The Miracle Worker?

Question: Stage setting that William Gibson suggests for his play The Miracle Worker!?
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The stage is cut diagonally!. In the back right triangle is the interior of the Kellers' house and in the front left is an area used for alternate settings!. The structures and furnishings are minimal so that actors can move in and out of places and specific times!. A few important props, however, do remain onstage: a pump, a window and a door!.
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