About: http://webisa.webdatacommons.org/126881518

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	How to do this is explained in different blog articles around SCSM. The reason why you extend the class can be for visualization, but in most cases this is done for reporting purpose.
http://www.w3.org/ns/prov#wasQuotedFrom	scug.be