| http://www.w3.org/ns/prov#value | - w defined by the downlight cone, the window including a first zone defining a first angle that ranges from about 90 degrees to about 130 degrees, the first angle lying on a first plane, a second zone defining a second angle that is about 180 degrees, the second angle lying on a second plane that is parallel to the first plane, wherein the vertices of the first and second angles lie on the longitud
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