About: http://webisa.webdatacommons.org/346670600

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	All in one SEO Pack plugin 1.6.14.5 is guilty (perhaps it is not guilty by itself but also due to the multisite setup of my site and other plugins I have just installed conflicting it).
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com