| http://www.w3.org/ns/prov#value | - FIG. 306 is a longitudinal cross-sectional side view of an article of footwear showing an upper, insole, superior spring element including an anterior spring element and posterior spring element, male and female mating structures, fastener, anterior outsole element including a backing and an outsole, inferior spring element, and a posterior outsole element including a pocket, a backing, and an out
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