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Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	U.S. Pat. No. 6,266,897 discloses a ground contacting system including 3D deformation elements having interiors filled with a compressible fluid or other materials such as liquids, foams, viscous materials, and/or viscoelastic materials.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com