About: http://webisa.webdatacommons.org/401397436

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	I have seen a formula for regular B-tree indexes, but that formula is very complicated, especially for an estimate.
http://www.w3.org/ns/prov#wasQuotedFrom	techtarget.com