About: http://webisa.webdatacommons.org/391278565

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	Of course if you will be sorting and other stuff that needs indexing it will do more harm than good, but if you plan to make the same query repeatedly you can gain a lot of performance (specially if it has JOINs)
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com