About: http://webisa.webdatacommons.org/4623444

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	If I understand you correctly there is no definitive answer on Unix, though you can infer it from looking at various files such as oratab or the contents of your dbs directories.
http://www.w3.org/ns/prov#wasQuotedFrom	oracle.com