About: http://webisa.webdatacommons.org/133223852

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	Some people use singleton for that but the main issue is that is complicates testing and especially unit testing.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com