| http://www.w3.org/ns/prov#value | - Preferably, the strips 22 are long, thin, rigid but collapsible and made of vinyl, although it should be noted that substantial benefit is derived from alternative embodiments of the present invention wherein differing sizes and shapes of strips 22 are present and wherein the strips 22 are made of a material other than vinyl so long as the strips 22 are capable of maintaining the rigidity of the s
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