About: http://webisa.webdatacommons.org/352999509

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	I normally just use the Save for Web feature in Ps, but you can do better with those tools listed, such as TinyPNG???assuming you are happy to serve the image up in that format.
http://www.w3.org/ns/prov#wasQuotedFrom	sitepoint.com