About: http://webisa.webdatacommons.org/84820676

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	Instead, they are elements that do not exist on the DOM but can be styled anyway. ::after is a good example of this since you can create style an element which does not really exist with it.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com