About: http://webisa.webdatacommons.org/174339298

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	This is possible in the header file, because the declaration of class X does not require specific details about Y (e.g. the size of an instance); only that Y is a class.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com