About: http://webisa.webdatacommons.org/125974533

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 query operation method according to claim 1, wherein said database operation is a join operation, and said database operation key is a join operation key.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com