About: http://webisa.webdatacommons.org/435484085

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	from the group comprising dyes, colour pigments, graphite, graphite-mica pigments, oxides such as iron oxides, molybdenum compounds, phosphates, phosphides such as iron phosphides, carbon black and zinc.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com