| http://www.w3.org/ns/prov#value | - Employees don???t get to see the sky, but what they do see, after driving through a hole in the side of a hill to reach their offices, is an endless expanse of limestone???walls, ceiling, pillars, and floor???all painted white. (Most of the ???streets??? are named after geologic layers of limestone and shale.) A facilities manager compared working underground to being in a mall, but the cavernous
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