| http://www.w3.org/ns/prov#value | - The upper portion 12 is preferably made of canvas, although, of course, it may be made of leather or other material, and the canvas has a -turned-in lower edge 20 or free end which over-lies or overlaps the sole 11 and is secured to the top of the sole 11 by adhesive cement or other well-known means.
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