About: http://webisa.webdatacommons.org/182647247

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	Rails also gives you enough Caching mechanisms (including russian doll caching), so if performance is an issue, cache the results, or call ActiveRecord::Base.connection.execute ... and use plain SQL.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com