About: http://webisa.webdatacommons.org/15568353

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	This does not follow if $S$ is not a set, because we cannot substitute $A:=S$ when $S$ is not a set. (Intuitively, a (proper) class is a collection too large to be a set.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com