About: http://webisa.webdatacommons.org/15219639

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 means that they do not have to wait for all of the images and other assets to finish loading (as a result of the onload event) before they can start doing their job.
http://www.w3.org/ns/prov#wasQuotedFrom	sitepoint.com