About: http://webisa.webdatacommons.org/406375451

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	Typically, the material used to form the mask is a metal such as titanium, titanium nitride, stainless steel and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com