About: http://webisa.webdatacommons.org/120786014

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	In all the embodiments the material of the cap, cover and covering cap may be a metal, such as iron, aluminum and the like, or a plastic, such as polyethylene, polypropylene, polyvinyl chloride, poly (fluorinated ethylene) and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es