About: http://webisa.webdatacommons.org/20544940

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	Hard shell: Exterior surface of a helmet that is made of thick, hard plastic, fiberglass or other material.
http://www.w3.org/ns/prov#wasQuotedFrom	helmets.org