About: http://webisa.webdatacommons.org/316836740

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	Once you have processed some data, these names are mostly left behind as a general user does not clean up the hidden (or very-hidden) sheets.
http://www.w3.org/ns/prov#wasQuotedFrom	superuser.com