About: http://webisa.webdatacommons.org/321154311

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	it can be any function that returns pointer to char or pointer to char constant. however i also suggest you using std::string and for example returning a reference to the std::string object
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com