| http://www.w3.org/ns/prov#value | - a continuous sheet having oppositely-directed obverse and reverse surfaces, the sheet including a core panel having edges, the sheet further including at least two side panels, each of the side panels having a folded portion connecting that side panel to the core panel along one of the edges so that when folded to form a stack with the core panel the at least two side panels are substantially alig
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