About: http://webisa.webdatacommons.org/336092458

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	Historically, indigo was a natural dye extracted from plants, and this process was important economically because blue dyes were once rare.
http://www.w3.org/ns/prov#wasQuotedFrom	shelf3d.com