About: http://webisa.webdatacommons.org/321901019

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	Yes, there is a few people here on SO who can answer that question (and you will find more on comp.lang.c++.moderated and comp.std.c++ on Usenet), but there are not many and even they sometimes disagree on subtle corner cases.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com