About: http://webisa.webdatacommons.org/19333604

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	You can not nest them, but you can group elements...there is a mechanism specifically for this, the <fieldset> element, used to group controls/labels...and in HTML5 associate it to specific forms, disable contents, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com