About: http://webisa.webdatacommons.org/405543334

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	The three layers are a physical layer or data access layer 102, a business layer 104 and a presentation layer or package layer 106.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com