About: http://webisa.webdatacommons.org/101481468

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	Sometimes ground signs are blocked by objects such as traffic, pedestrians or physical structures.
http://www.w3.org/ns/prov#wasQuotedFrom	calibresigns.com