About: http://webisa.webdatacommons.org/415776050

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	According to this, Robbin's problem concerning whether a Robbin's Algebra is a Boolean algebra is an important example.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com