About: http://webisa.webdatacommons.org/293379104

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	In an alternative approach, the road sign can be displayed for a predetermined period of time, for example 30 seconds to one minute.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com