About: http://webisa.webdatacommons.org/247759126

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	URL is a subset of URI. so a URL can be converted to URI, but URI can not convert to URL.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com