About: http://webisa.webdatacommons.org/67241026

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	I had to do the same, except in my case they were greyed out i.e. unusable.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com