About: http://webisa.webdatacommons.org/137813704

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	The sheath 6 is preferably formed of a substantially rigid material, such as a molded plastic, wood, metal or other suitable material, and includes an inner wall 10 and an outer wall 11.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es