About: http://webisa.webdatacommons.org/77905481

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	Commenting and annotating ??? a variety of tools exist that allow the user to comment and annotate on web pages, .pdf files and other documents.
http://www.w3.org/ns/prov#wasQuotedFrom	edtechvision.org