| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWING FIGURES [0035] The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same becomes better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein: [0036]FIG. 1 is a schematic diagram illustrating an external light source being u
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