About: http://webisa.webdatacommons.org/199402475

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	So if T is a class then T.toString() means that class must have a default toString() as static. but that is not true. hence compilation error.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com