About: http://webisa.webdatacommons.org/142234498

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	But we all know that finite rooted trees have order type epsilon-0, which by Gentzen's theorem cannot be proved well-founded in PA. So there is a fact that we use all the time, he is independent of PA, Q.E.D.
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net