About: http://webisa.webdatacommons.org/420924158

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	Accordingly, what is needed is a method and system for improving the estimation of the cardinality of a group of columns, particularly after operations such as a grouping and/or duplicate removal operation has been performed.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com