About: http://webisa.webdatacommons.org/89999590

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	Another answer could be that you do not have notification types set up correctly for some services or groups.
http://www.w3.org/ns/prov#wasQuotedFrom	serverfault.com