About: http://webisa.webdatacommons.org/411998126

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	This is an extension to popup alternate texts given as ALT attributes (they are not descriptions, but authors often use the attribute only for popups), like NC4, IE, and other browsers.
http://www.w3.org/ns/prov#wasQuotedFrom	sakura.ne.jp