About: http://webisa.webdatacommons.org/270939405

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	However, for avoiding the coloring of the glass, preferably, coloring components such as Cr, V, etc., including CuO, are not incorporated.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com