About: http://webisa.webdatacommons.org/150543671

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	Of course, the second metallic layer may be made of another metal such as Si, Hf, Zr, Ti, Mg, Cr, Mo, Nb or W which can be converted into the corresponding stable oxide, instead of Al.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com