About: http://webisa.webdatacommons.org/407262938

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 reference density vector can be available by a means other than a man-machine interface such as a pointing device, e.g., a program.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr