| http://www.w3.org/ns/prov#value | - In the 1840s, a method of hardening rubber and stopping it from decaying, called vulcanization, was developed in both England and the United States.[6] Vulcanized rubber is used in the production of all types of shoes, but is especially beneficial in the production of cleats, in that one of the primary purposes of football cleats is to protect the player???s feet.
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