About: http://webisa.webdatacommons.org/62418390

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	Because COUNT(column), like all aggregate functions except COUNT(*), ignores nulls.
http://www.w3.org/ns/prov#wasQuotedFrom	techtarget.com