About: http://webisa.webdatacommons.org/12519385

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	Also, for a method using a time server, it is necessary to prepare and maintain the servers and other facilities.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es