About: http://webisa.webdatacommons.org/428484489

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	Coverig indexes that include all columns are a very bad idea, because the PK lookup is much less expensive than the overhead incurred by having to maintain 2 complete data copies of the table.
http://www.w3.org/ns/prov#wasQuotedFrom	serverfault.com