About: http://webisa.webdatacommons.org/40312554

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	Sounds elegant and can be done, but in practice putting a marker before dragging becomes another step and cleaning markers after each event drag is a drag.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com