| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS [0024]FIG. 1 is a side view of a flexible central portion according to an embodiment of the invention; [0025]FIG. 2 is a side view of a curved flexible central portion according to another embodiment of the invention; [0026]FIG. 3 is a side view of a flexible central portion having solid end segments according to an embodiment of the invention; [0027]FIG. 3A is a
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