About: http://webisa.webdatacommons.org/13998115

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	That is, they can leave a comment of any sort, similar to comments that can be added to status updates, pictures, or other types of content.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com