| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood by an examination of the following description, together with the accompanying drawings, in which: FIG. 1a is a diagram illustrating an artificial curling ice sheet according to the present invention; FIG. 1b is a close view of the surface of the artificial curling sheet according to a first embodiment of the present inventi
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