About: http://webisa.webdatacommons.org/164199273

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 is not that everything is a class": what you are bumping into is that everything is an object (that is, every (new-style) thing descends from object).
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com