About: http://webisa.webdatacommons.org/91966151

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	is_object<int &>::value is an integral constant expression that evaluates to false: reference types are not objects
http://www.w3.org/ns/prov#wasQuotedFrom	boost.org