About: http://webisa.webdatacommons.org/287363480

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 similar to your approach above except do the calculation periodically and remove the 10 seconds if clause.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com