| http://www.w3.org/ns/prov#value | - The frame 11 is constructed of durable material, such as plastic or wood, and is rectangular or nearly square in configuration, consisting of two vertical frame members 16 and 16', two horizontal frame members 17 and 17', with the vertical frame member 16 having an external side wall 18 and an internal side wall 18', the vertical frame member 16' having an external side wall 19 and an internal sid
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