| http://www.w3.org/ns/prov#value | - Treasury Regulation 1.48-1(e)(2) defines structural components to include walls, partitions, floors, ceilings, permanent coverings such as paneling or tiling, windows and doors, components of central air conditioning or heating systems, plumbing and plumbing fixtures, electrical wiring and lighting fixtures, chimneys, stairs, escalators, elevators, sprinkling systems, fire escapes, and other compo
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