About: http://webisa.webdatacommons.org/311440204

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	A primary key is a column or columns in a table whose values uniquely identify each row in a table.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com