About: http://webisa.webdatacommons.org/124424217

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	But this handler can fire multiple times for certain types of items, so to ensure we only add the line once we clear a boolean flag OnTooltipCleared.
http://www.w3.org/ns/prov#wasQuotedFrom	wowprogramming.com