About: http://webisa.webdatacommons.org/172707144

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	It should be noted that the intermediate layer 30 is only required where the combination of the base material 10, the cladding material (12a or 12b) and a corrosive environment, such as seawater, are all proximate each other.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com