About: http://webisa.webdatacommons.org/18099078

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	For example, in waveguides made of germania containing glasses wherein silica is a constituent, the cladding layer will contain more silica than the core material in order to obtain the proper indices of refraction.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com