| http://www.w3.org/ns/prov#value | - 2 l); sad face (FIG. 2 m); tree (FIG. 2 n); crescent moon (FIG. 2 o); cross (FIG. 2 p); 4-pointed star (FIG. 2 q); flower (FIG. 2 r); ellipse (FIG. 2 s); wave (FIG. 2 t); lightening bolt (FIG. 2 u); pinwheel (FIG. 2 v); flag (FIG. 2 w); lips (FIG. 2 x); one or more alphanumeric letters; any other geometric shape, such as a polygon; or any combination of the foregoing.
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