About: http://webisa.webdatacommons.org/449637360

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	Preferably, base layer 30 and surface layer 34 comprise rigid materials such as metal or rigid polymers.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com