About: http://webisa.webdatacommons.org/280015547

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	Yes, collecting real data is a pain and at first it does not provide a lot of useful info, but over time it really does begin to provide reasonably accurate estimates.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com