About: http://webisa.webdatacommons.org/208365360

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	Chemists have most of the visible light spectrum down pat???it???s common knowledge that sodium makes orange and barium makes green, for instance???but blue is a harder nut to crack.
http://www.w3.org/ns/prov#wasQuotedFrom	needsupply.com