About: http://webisa.webdatacommons.org/19581465

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	So I do not know if keeping marker bitmaps cached in memory is a good thing, as some of them might be show once and never seen again....
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com