About: http://webisa.webdatacommons.org/127966147

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 is required to keep high reflectivity and rapidly cool down, and is in many cases made of a material of high thermoconductivity, e.g., Ag, Au or Cu, in particular Ag.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com