About: http://webisa.webdatacommons.org/264500387

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	Such protrusions may be resilient and be made from rubber or another suitable outsole material, or may be rigid and be made from plastic, metal or other such material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com