About: http://webisa.webdatacommons.org/147241455

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 facepiece 2 may be formed of any suitable flexible material, e.g. molded from rubber, but preferably silicone rubber.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com