About: http://webisa.webdatacommons.org/369341126

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	Heracles noticed the purple stains around the dog's mouth and worked out from this how to make the dye.Amethysts are a semi-precious stone with a purple colour.
http://www.w3.org/ns/prov#wasQuotedFrom	h2g2.com