About: http://webisa.webdatacommons.org/71455704

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	Beware with @Tolga comment above, as it will work if at least one of the arguments to the addition is a std::string, but will fail to concatenate string literals.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com